Effects of Different Anode Binder Systems on the Performance of Lithium-ion Batteries
In order to optimize the anode binder systems of lithium-ion batteries,the effects of different anode binder systems(SBR+CMC,PAN/PAA-Li+CMC,PAN/PAA-Li)on the performance of lithium ion battery were studied by using three different anode binder systems(SBR+CMC,PAN/PAA-Li+CMC,PAN/PAA-Li)composed of new aqueous binder(PAN/PAA-Li),styrene-butadiene rubber(SBR)and sodium carboxymethyl cellulose(CMC).The results show that PAN/PAA-Li contains more polar groups.Compared with the SBR+CMC system,the PAN/PAA-Li system increases the electrode bond strength by 21％,the battery capacity by 0.67％,the initial Coulomb efficiency by 0.60％,and slightly improves the performance of high temperature storage and 45 ℃ cycle with same addition amount.However,it also caused the increase of impedance,the reduction of low temperature discharge voltage platform,and the capacity retention of 600 cycles at 25 ℃ decreased by 0.7％.The performance of PAN/PAA-Li+CMC system is in the middle among the three.The overall performance of PAN/PAA-Li system can basically replace SBR+CMC system,but the impedance and low temperature performance still need to be further improved.The results provide data support for the selection and optimization of negative binder system for lithium-ion battery.
万方数据
维普
