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Nickel-iron battery with high power

專利號(hào)
US10868338B2
公開(kāi)日期
2020-12-15
申請(qǐng)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(shuō)明書

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  • Power density is the amount of power per unit volume. Power density is given in Watts/liter (W/L).
  • C rate specifies charge and discharge currents. At 1C, the battery charges and discharges at a current that is par with the marked Ah rating. At 0.5C, the current is half, and at 0.1C the current is one tenth. For example, 1C charges a battery in about one hour; 0.5C would take 2 hours and 0.1C about 10 hours.
  • Watt hour efficiency is the energy discharged as a percentage of energy charged.
  • Charge retention is the capacity measured after 28 days at 20° C.
  • Cycle life of the battery is an important aspect, and is measured at 80% DOD (depth of discharge), at 20° C., 1C charge, 1C discharge, to 70% capacity.

    • The invention comprises a battery with an iron anode and nickel cathode. The battery, in one embodiment comprises an iron electrode comprised of a single, coated conductive substrate, prepared by a simple coating process, which can be continuous. The substrate can be coated on one side, or on both sides.

    The battery is prepared by conventional processing and construction with an iron anode and a cathode, i.e., a nickel cathode. The battery of the present invention, however, comprises a particular electrolyte. In one embodiment, the nickel-iron battery also comprises a particular separator, e.g., comprised of a polyolefin. In one embodiment, the iron electrode is comprised of a single, coated conductive substrate, as shown in FIGS. 1 and 2.

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