摘要
研制成功了１／２Ａ型金属氢化物－镍电池，外形尺寸为：（Φ１６．５×２８．５）ｍｍ，正负电极采用双发泡镍式骨架，正极活性物质为含Ｃｏ８％球形Ｎｉ（ＯＨ）２，充分提高活性物质利用率，负极活性物质为包覆金属贮氢合金并加入２％抗粉化剂，克服因贮氢材料随充放循环次数增加而粉化导致电池寿命的降低。成品电极经疏水处理，电解液采用密度１．２８ＫＯＨ水溶液加入２％的ＬｉＯＨ及０．５％多官能团添加剂抑制自放电和电极膨胀。经上述处理的１／２Ａ型电池，０．２Ｃ率放电９５０ｍＡｈ，１Ｃ率放电８５５ｍＡｈ，自放电率＜２５％（２８天），１Ｃ率循环１００次容量衰减＜１０％，满足用于移动电话电池组所要求的内阻低、小巧轻便之特点。
The 1/2 A size (Φ16.5×28.5)mm Ni MH batteries have been developed.The foamed nickel substrates at a density of 1.20-1.35g/cm 3 are used in both electrodes.The spherical Ni(OH) 2 with 8% Co and the plated hydrogen storage alloy with 2% anti pulverizing composition are used as positive and negative electrode material respectively.The hydrophobic treatment is applied on the finished electrodes.The d = 1.28 KOH with 2% LiOH and 0.5% multifunctional group additive is used as electrolyte,they alleviate the electrode expansion and self discharge.The batteries fabrica ted offer a capacity of 950 mAh at 0.2 C rate,and 855 mAh at 1 C rate,self dischage<25%(28d),and capacity decay <10% after 100 cycles at 1 C rate.It is satisfied for this battery using in mobile phones application by the low resistance and portable characte ristics.
出处
《电源技术》
CAS
CSCD
北大核心
1997年第2期77-79,共3页
Chinese Journal of Power Sources
关键词
氢镍电池
添加剂
金属氢化物
A Ni MH battery,cobalt powder,additives,mobile phone battery pack
