Yolk-shell ZnO-C microspheres with enhanced electrochemical performance as anode material for lithium ion batteries
Yolk-shell ZnO-C microspheres with enhanced electrochemical performance as anode material for lithium ion batteries
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具有增强电化学性能的蛋黄壳ZnO-C微球作为锂离子电池负极材料
DOI：
10.1016/j.electacta.2014.02.003
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发表时间：
2014-04-10
影响因子：
6.6
通讯作者：
Peng, Dong-Liang
中科院分区：
文献类型：
--
作者：
Xie, Qingshui;Zhang, Xiaoqiang;Peng, Dong-Liang
通过简单的化学溶液反应，在氩气中煅烧，制备了蛋黄壳结构、空心结构和实心结构的ZnO-C样品。作为锂离子电池负极材料时，蛋黄壳结构的ZnO-C微球表现出比空心和实心微球更好的电化学性能。经过150次循环后，蛋黄壳ZnO-C微球在100 mAg（-1）的电流密度下表现出520 mA h g（-1）的相对高容量，库仑效率约为99.3%。蛋黄-壳结构ZnO-C微球具有优异的循环稳定性和倍率性能，这是其独特的蛋黄-壳结构和额外的碳载体协同作用的结果。(C)2014爱思唯尔有限公司版权所有。
Three ZnO-C samples with distinct structures including yolk-shell microspheres, hollow microspheres and solid microspheres are fabricated through a facile chemical solution reaction followed by calcination in argon. When employed as the anode materials for lithium ion batteries, yolk-shell ZnO-C microspheres exhibit the best electrochemical properties than the hollow and solid microspheres. After 150 cycles, yolk-shell ZnO-C microspheres demonstrate a relative high capacity of 520 mA h g(-1) at a current density of 100 mAg(-1) with a Coulombic efficiency of about 99.3%. The excellent cycling stability and good rate capability of yolk-shell ZnO-C microspheres stem from the synergistic effect of the unique yolk-shell structures and extra carbon support. (C) 2014 Elsevier Ltd. All rights reserved.