拉浆负极用粘合剂的研究

采用拉浆工艺生产MH-Ni电池负极,工艺简单,价格便宜,利于连续生产.从拉浆贮氢负极工业化大生产的工艺可行性出发,并基于常用的粘合剂(PVA、MC、CMC等),研究了四种不同种类的粘合剂:1~＃——PVA(2.5%),2~＃——MC(2.5%),3~＃——PVF+CMC(2.5%),4~＃——PVA+CMC(2.5%);探讨了粘合剂种类及用量不同时对拉装工艺和电化学性能的影响.考察电池的泄漏情况、内压情况、循环寿命和自放电性能等综合水平,表明4~＃粘合剂具有良好的流动性和连续性,其用量在15%～20%时对循环寿命和自放电性能最为有利.

Investigation of the binders in the slurried MH electrode

The slurry technology used in producing MH negative is characterized as simple,low price and capable of successive manufacture. With the technological feasibility and adopted commonly,four kinds of binders were researched. 1#-PVA(2. 5%);2#-MC(2. 5%);3#--PVF+CMC(2. 5%);4#--PVA+CMC(2. 5%). On the basis of multiple valuation ofthe battery performance with respect to leakage, internal pressure, cycle lif e and self-discharge rate.it is determined that binder 4# has good fluidity and continuity properties and the 15%-20% dosage of it is most favourable to the battery's cycle life and self-discharge.