Advantages of blending LiNi0.8Co0.2O2 into Li1+xMn2−xO4 cathodes

Abstract LiNi 0.8 Co 0.2 O 2 blending was investigated as a way to overcome the problems associated with lithium ion rechargeable batteries that use manganese spinel as a cathode material. LiNi 0.8 Co 0.2 O 2 is a useful additive for preventing HF-generation and Li-loss in electrolytes during storage at elevated temperatures. In experiments, the Mn dissolution from the spinel structure into the electrolyte was decreased by adding LiNi 0.8 Co 0.2 O 2 . This dissolution was almost completely eliminated by 15 wt.% LiNi 0.8 Co 0.2 O 2 blending. As a result, this blending technique can prevent the decline in capacity caused by storage at elevated temperatures.