Improving the Electrochemical Performance of SnO2 Cathodes in Lithium Secondary Batteries by Doping with Mo

Abstract

Small‐grain SnO 2 , SnO 2 / Mo (2%), and SnO 2 / Mo (30%) samples were prepared by using the low‐temperature aqueous methods and tested as cathodes in secondary lithium batteries. Cells were cycled between 1.0 and 0.0 V. The best electrochemical performance was obtained from the Li / [ SnO 2 / Mo   ( 2 % ) ] cell, which retained 87% of its initial capacity (510 mAh/g) after 50 cycles; by contrast, the Li / SnO 2 cell only retained 60% of its initial capacity (570 mAh/g). Significantly increased Mo contents caused the capacity to fade drastically. © 1999 The Electrochemical Society. All rights reserved.