The adulterant of Co can stabilize the structure and prohibit the Jahn-Teller effect in LiMn_2O_4. The results showed that LiCo_(0.1)Mn_(1.9)O_4 had good electrochemical performances.

• 一、本文利用半径较Mn小、M-O键键能大；可以有效稳定LiMn_2O_4的尖晶石结构；抑制Jahn-Teller效应的Co作为掺杂元素；湿化学法合成Co元素掺杂的具有良好电化学性能的LiCo_(0.；1)Mn_(1