Influence of dilution effect on the electrochemical performance of integrated 0.5Li(Mn_(1.5)Ni_(0.5))O_4. 0.5(Li_2MnO_3-Li(Mn_(0.5)Ni_(0.5))O_2 cathodes

摘要

We report the influence of dilution effect on the synthesis and electrochemical profiles of integrated spinel-layered 0.5Li(Mn_(1.5)Ni_(0.5))O_4. 0.5 (Li_2MnO_3-Li(Mn_(0.5)Ni_(0.5))O_2 cathodes prepared by scalable continuous stirred tank reactor (CSTR). Apparently, the dilution of chclating agent or precursor solutions leads to the formation of unavoidable impurity phases. However, the presence of such impurity traces certainly improves the electrochemical stability of such spinel-layered integrated electrodes. In addition, influence of operating potential is also investigated and it was found that 2.4-4.8 V vs. Li is the optimal condition to yield high capacity and high performance cathode material.