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</div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Type of rechargeable battery</div> <p>A <b>silver–cadmium battery</b> is a type of rechargeable battery using <a href="/wiki/Cadmium" title="Cadmium">cadmium</a> metal as its negative terminal, <a href="/wiki/Silver" title="Silver">silver</a> oxide as the positive terminal, and an alkaline water-based electrolyte. It produces about 1.1 volts per cell on discharge, and about 40 watthours per kilogram <a href="/wiki/Specific_energy" title="Specific energy">specific energy density</a>. A silver–cadmium battery provides more energy than a nickel–cadmium cell of comparable weight. It has higher life cycle expectancy than silver–zinc cells, but lower terminal voltage and lower energy density.<sup id="cite_ref-TC00_1-0" class="reference"><a href="#cite_note-TC00-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> However, the high cost of silver and the <a href="/wiki/Cadmium_poisoning" title="Cadmium poisoning">toxicity of cadmium</a> restrict its applications. </p><p>The first silver–cadmium batteries were developed by <a href="/wiki/Waldemar_Jungner" title="Waldemar Jungner">Waldemar Jungner</a> around 1900, who used them in a demonstration electric car and whose company commercially manufactured the cells.<sup id="cite_ref-KD16_2-0" class="reference"><a href="#cite_note-KD16-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> These original cells suffered from short life, and it was not until 1941 that an improved separator material was developed to prevent migration of the silver oxide within the cell.<sup id="cite_ref-HDBK_3-0" class="reference"><a href="#cite_note-HDBK-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Renewed commercial development occurred during the 1950s, to take advantage of the better cycle life of the silver–cadmium system compared to silver-zinc. Like other silver-oxide battery systems, silver–cadmium batteries have relatively flat voltage during discharge. However, high-rate performance is not as good as for silver-zinc batteries. To preserve the operating life of cells, they may be shipped "dry" and the end-user adds electrolyte just before use. </p><p>The positive electrode is made of sintered silver powder pasted onto a silver grid as current collector; the silver oxide may be formed in a separate process or may be formed on first charging of the cell. The cadmium negative electrode is formed of a pasted grid. Electrolytes are solutions of potassium hydroxide in water. Cells are provide with vent caps to prevent reaction of the electrolyte with carbon dioxide in the air. Theoretically as little of two grams of silver are required for each ampere-hour of capacity, but practical cells require between 3 and 3.5 grams.<sup id="cite_ref-HDBK_3-1" class="reference"><a href="#cite_note-HDBK-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Because the charging voltage is higher than the discharge voltage, the watt-hour efficiency of a silver–cadmium cell is about 70%; ampere-hour efficiency is about 98%. The usual recommended charging method is constant-current charging at a 10 or 20 hour rate, (restoring the capacity of the battery over 10 or 20 hours), and cut off of charging at 1.6 volts per cell. Cells are commercially manufactured from 2 to 2500 ampere-hours capacity, but are often customized for particular uses. </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Silver%E2%80%93cadmium_battery&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-TC00-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-TC00_1-0">^</a></b></span> <span class="reference-text">Thomas P J Crompton, <i>Battery Reference Book third Edition</i> Newnes, 2000 <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0080499953" title="Special:BookSources/0080499953">0080499953</a> pages 5-5 through 5-7</span> </li> <li id="cite_note-KD16-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-KD16_2-0">^</a></b></span> <span class="reference-text">Kevin Desmond, <i>Innovators in Battery Technology: Profiles of 95 Influential Electrochemists</i> McFarland, 2016, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1476622787" title="Special:BookSources/1476622787">1476622787</a>, pages 115–116</span> </li> <li id="cite_note-HDBK-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-HDBK_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-HDBK_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Davide Linden (ed), <i>Handbook of Batteries Third Edition</i>,McGraw-Hill, 2002 <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-07-135978-8" title="Special:BookSources/0-07-135978-8">0-07-135978-8</a>, pages 33.1 – 33.2</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Silver%E2%80%93cadmium_battery&action=edit&section=2" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_battery_types" title="List of battery types">List of battery types</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist 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.navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style><style data-mw-deduplicate="TemplateStyles:r886047488">.mw-parser-output .nobold{font-weight:normal}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"></div><div role="navigation" class="navbox" aria-labelledby="Electrochemical_cells" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style 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abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Galvanic_cells" title="Template:Galvanic cells"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Galvanic_cells" title="Template talk:Galvanic cells"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Galvanic_cells" title="Special:EditPage/Template:Galvanic cells"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Electrochemical_cells" style="font-size:114%;margin:0 4em"><a href="/wiki/Electrochemical_cell" title="Electrochemical cell">Electrochemical cells</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Types</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Galvanic_cell" title="Galvanic cell">Galvanic cell</a></li> <li><a href="/wiki/Concentration_cell" title="Concentration cell">Concentration cell</a></li> <li><a href="/wiki/Electric_battery" title="Electric battery">Electric battery</a> <ul><li><a href="/wiki/Flow_battery" title="Flow battery">Flow battery</a></li> <li><a href="/wiki/Trough_battery" title="Trough battery">Trough battery</a></li></ul></li> <li><a href="/wiki/Fuel_cell" title="Fuel cell">Fuel cell</a></li> <li><a href="/wiki/Thermogalvanic_cell" title="Thermogalvanic cell">Thermogalvanic cell</a></li> <li><a href="/wiki/Voltaic_pile" title="Voltaic pile">Voltaic pile</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="5" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Galvanic_Cell.svg" class="mw-file-description" title="Galvanic cell"><img alt="Galvanic cell" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Galvanic_Cell.svg/150px-Galvanic_Cell.svg.png" decoding="async" width="150" height="159" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Galvanic_Cell.svg/225px-Galvanic_Cell.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Galvanic_Cell.svg/300px-Galvanic_Cell.svg.png 2x" data-file-width="376" data-file-height="399" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Primary_battery" title="Primary battery">Primary cell</a><br /><span class="nobold">(non-rechargeable)</span></div></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alkaline_battery" title="Alkaline battery">Alkaline</a></li> <li><a href="/wiki/Aluminium%E2%80%93air_battery" title="Aluminium–air battery">Aluminium–air</a></li> <li><a href="/wiki/Bunsen_cell" title="Bunsen cell">Bunsen</a></li> <li><a href="/wiki/Chromic_acid_cell" title="Chromic acid cell">Chromic acid</a></li> <li><a href="/wiki/Clark_cell" title="Clark cell">Clark</a></li> <li><a href="/wiki/Daniell_cell" title="Daniell cell">Daniell</a></li> <li><a href="/wiki/Dry_cell" title="Dry cell">Dry</a></li> <li><a href="/wiki/Edison%E2%80%93Lalande_cell" title="Edison–Lalande cell">Edison–Lalande</a></li> <li><a href="/wiki/Grove_cell" title="Grove cell">Grove</a></li> <li><a href="/wiki/Leclanch%C3%A9_cell" title="Leclanché cell">Leclanché</a></li> <li><a href="/wiki/Lithium_metal_battery" title="Lithium metal battery">Lithium metal</a></li> <li><a href="/wiki/Lithium%E2%80%93air_battery" title="Lithium–air battery">Lithium–air</a></li> <li><a href="/wiki/Mercury_battery" title="Mercury battery">Mercury</a></li> <li><a href="/wiki/Metal%E2%80%93air_electrochemical_cell" title="Metal–air electrochemical cell">Metal–air electrochemical</a></li> <li><a href="/wiki/Nickel_oxyhydroxide_battery" title="Nickel oxyhydroxide battery">Nickel oxyhydroxide</a></li> <li><a href="/wiki/Silicon%E2%80%93air_battery" title="Silicon–air battery">Silicon–air</a></li> <li><a href="/wiki/Silver_oxide_battery" title="Silver oxide battery">Silver oxide</a></li> <li><a href="/wiki/Weston_cell" title="Weston cell">Weston</a></li> <li><a href="/wiki/Zamboni_pile" title="Zamboni pile">Zamboni</a></li> <li><a href="/wiki/Zinc%E2%80%93air_battery" title="Zinc–air battery">Zinc–air</a></li> <li><a href="/wiki/Zinc%E2%80%93carbon_battery" title="Zinc–carbon battery">Zinc–carbon</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Rechargeable_battery" title="Rechargeable battery">Secondary cell</a><br /><span class="nobold">(rechargeable)</span></div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Automotive_battery" title="Automotive battery">Automotive</a></li> <li><a href="/wiki/Lead%E2%80%93acid_battery" title="Lead–acid battery">Lead–acid</a> <ul><li><a href="/wiki/VRLA_battery" title="VRLA battery">gel–VRLA</a></li></ul></li> <li><a href="/wiki/Lithium%E2%80%93air_battery" title="Lithium–air battery">Lithium–air</a></li> <li><a href="/wiki/Lithium-ion_battery" title="Lithium-ion battery">Lithium ion</a> <ul><li><a href="/wiki/Dual_carbon_battery" title="Dual carbon battery">Dual carbon</a></li> <li><a href="/wiki/Lithium_iron_phosphate_battery" title="Lithium iron phosphate battery">Lithium–iron–phosphate</a></li> <li><a href="/wiki/Lithium_polymer_battery" title="Lithium polymer battery">Lithium–polymer</a></li> <li><a href="/wiki/Lithium%E2%80%93sulfur_battery" title="Lithium–sulfur battery">Lithium–sulfur</a></li> <li><a href="/wiki/Lithium-titanate_battery" title="Lithium-titanate battery">Lithium–titanate</a></li></ul></li> <li><a href="/wiki/Metal%E2%80%93air_electrochemical_cell" title="Metal–air electrochemical cell">Metal–air</a></li> <li><a href="/wiki/Molten-salt_battery" title="Molten-salt battery">Molten salt</a></li> <li><a href="/wiki/Nanopore_battery" title="Nanopore battery">Nanopore</a></li> <li><a href="/wiki/Nanowire_battery" title="Nanowire battery">Nanowire</a></li> <li><a href="/wiki/Nickel%E2%80%93cadmium_battery" title="Nickel–cadmium battery">Nickel–cadmium</a></li> <li><a href="/wiki/Nickel%E2%80%93hydrogen_battery" title="Nickel–hydrogen battery">Nickel–hydrogen</a></li> <li><a href="/wiki/Nickel%E2%80%93iron_battery" title="Nickel–iron battery">Nickel–iron</a></li> <li><a href="/wiki/Nickel%E2%80%93lithium_battery" title="Nickel–lithium battery">Nickel–lithium</a></li> <li><a href="/wiki/Nickel%E2%80%93metal_hydride_battery" title="Nickel–metal hydride battery">Nickel–metal hydride</a></li> <li><a href="/wiki/Nickel%E2%80%93zinc_battery" title="Nickel–zinc battery">Nickel–zinc</a></li> <li><a href="/wiki/Polysulfide%E2%80%93bromide_battery" title="Polysulfide–bromide battery">Polysulfide–bromide</a></li> <li><a href="/wiki/Potassium-ion_battery" title="Potassium-ion battery">Potassium ion</a></li> <li><a href="/wiki/Rechargeable_alkaline_battery" title="Rechargeable alkaline battery">Rechargeable alkaline</a></li> <li><a class="mw-selflink selflink">Silver–cadmium</a></li> <li><a href="/wiki/Silver_zinc_battery" title="Silver zinc battery">Silver–zinc</a></li> <li><a href="/wiki/Sodium-ion_battery" title="Sodium-ion battery">Sodium ion</a></li> <li><a href="/wiki/Sodium%E2%80%93sulfur_battery" title="Sodium–sulfur battery">Sodium–sulfur</a></li> <li><a href="/wiki/Solid-state_battery" title="Solid-state battery">Solid state</a></li> <li><a href="/wiki/Vanadium_redox_battery" title="Vanadium redox battery">Vanadium redox</a></li> <li><a href="/wiki/Zinc%E2%80%93bromine_battery" title="Zinc–bromine battery">Zinc–bromine</a></li> <li><a href="/wiki/Zinc%E2%80%93cerium_battery" title="Zinc–cerium battery">Zinc–cerium</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Other cell</div></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atomic_battery" title="Atomic battery">Atomic battery</a></li> <li><a href="/wiki/Fuel_cell" title="Fuel cell">Fuel cell</a></li> <li><a href="/wiki/Solar_cell" title="Solar cell">Solar cell</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cell parts</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anode" title="Anode">Anode</a></li> <li><a href="/wiki/Binder_(material)" title="Binder (material)">Binder</a></li> <li><a href="/wiki/Catalysis" title="Catalysis">Catalyst</a></li> <li><a href="/wiki/Cathode" title="Cathode">Cathode</a></li> <li><a href="/wiki/Electrode" title="Electrode">Electrode</a></li> <li><a href="/wiki/Electrolyte" title="Electrolyte">Electrolyte</a></li> <li><a href="/wiki/Half-cell" title="Half-cell">Half-cell</a></li> <li><a href="/wiki/Ion" title="Ion">Ions</a></li> <li><a href="/wiki/Salt_bridge" title="Salt bridge">Salt bridge</a></li> <li><a href="/wiki/Semipermeable_membrane" title="Semipermeable membrane">Semipermeable membrane</a></li></ul> </div></td></tr></tbody></table></div> <style data-mw-deduplicate="TemplateStyles:r1012311289">.mw-parser-output .asbox{position:relative;overflow:hidden}.mw-parser-output .asbox table{background:transparent}.mw-parser-output .asbox p{margin:0}.mw-parser-output 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