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论文类型：期刊论文

发表时间：2016-01-10

发表刊物：ELECTROCHIMICA ACTA

收录刊物：SCIE、EI

卷号：188

页面范围：793-800

ISSN号：0013-4686

关键字：MnO@C composite; Porous structure; Precipitation; Glucose; Lithium-ion batteries

摘要：MnC2O4 precursor was prepared by a precipitation method, and then porous MnO@C composites were obtained by mixing MnC2O4 precursor with different amounts of glucose and sintering at different temperatures. The influences of carbon content and crystallinity on the electrochemical performance of MnO@C were investigated. Galvanostatic charge-discharge test results showed that the MnO@C sample "1.2,700" has the largest specific capacity among all samples, which can reach high specific discharge capacity of 1691 mAhg(-1) at the current density of 100 mAg(-1) after 200 cycles. Even at the high current density of 1600 mA g(-1), a remarkable discharge capacity of 630 mAhg(-1) can still be delivered, demonstrating a good rate capability. The excellent electrochemical performance can be ascribed to porous structure, good crystallinity and proper amount of carbon coating. This facile method can be applied to the large-scale synthesis of high performance transition metal oxide@carbon composite electrode materials. (C) 2015 Elsevier Ltd. All rights reserved.