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Nickel-iron battery with high power

專利號
US10868338B2
公開日期
2020-12-15
申請人
Encell Technology, Inc.（US FL Alachua）
發(fā)明人
Randy Ogg
IPC分類
H01M10/26; H01M4/24; H01M10/30; H01M2/16; H01M4/32; H01M4/02
技術(shù)領(lǐng)域
iron,battery,sulfide,anode,in,hydroxide,sodium,separator,fe,electrode
地域： FL FL Alachua

摘要

The present invention provides one with a Ni—Fe battery exhibiting enhanced power characteristics. The battery uses a particular electrolyte. The resulting characteristics of specific power and power density are much improved over conventional Ni—Fe batteries. The electrolyte comprises sodium hydroxide, with lithium hydroxide and sodium sulfide. The iron anode comprises an iron active material and a polyvinyl alcohol binder.

說明書

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183 40 W/kg (specific power) 2,100 100 W/L (power density) 3,660 80 WH efficiency 95% 65% Charge Retention 95% 60% (Capacity @ 28 days 20° C.) Cycle Life 10,000 1,000 (@80% DOD, 20° C., 1 C Charge, 1 C Discharge, to 70% Capacity) In the foregoing table, WH is Watt hours.

In the foregoing comparison, the invention Ni—Fe battery used an electrolyte comprised of sodium hydroxide (NaOH), lithium hydroxide (LiOH), and sodium sulfide (Na2S). The separator used in the inventive Ni—Fe battery was a 0.010 inch thick polyolefin non-woven mesh. The electrolyte used in the conventional Ni—Fe battery was potassium hydroxide (KOH), and the battery separator was 0.060 inch thick polyvinyl chloride (PVC) windows. The results show a vast improvement in performance characteristics for the inventive Ni—Fe battery. The Ni—Fe battery, in addition to having a cycle life of at least 10,000 cycles, can also have a capacity at 28 days, 20° C., of at least 95%; a power density of at least 3,660 W/L and specific power of at least 2100 W/kg.

權(quán)利要求

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