Enhanced high rate properties of ordered porous Cu2O film as anode for lithium ion batteries
Enhanced high rate properties of ordered porous Cu2O film as anode for lithium ion batteries
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DOI：
10.1016/j.electacta.2010.03.091
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发表时间：
2010-07
影响因子：
6.6
通讯作者：
J. Xiang;X. Wang;X. Xia;Luming Zhang;Yu Zhou;S. Shi;J. Tu
中科院分区：
文献类型：
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作者：
J. Xiang;X. Wang;X. Xia;Luming Zhang;Yu Zhou;S. Shi;J. Tu
通过自组装聚苯乙烯球模板在铜箔上电沉积高度有序的多孔 Cu2O 薄膜。与致密的Cu2O薄膜和八面体Cu2O粉末相比，有序多孔Cu2O薄膜表现出更好的电化学循环稳定性。多孔Cu2O薄膜在0.1C和5C倍率下循环50次后容量可分别保持336mAhg-1和213mAhg-1。当充放电倍率增加50倍时，可逆容量仍保持在63.4%。有序多孔膜高倍率性能的增强应归因于Cu2O/电解质的充分接触表面和Li+的短扩散长度。此外，Cu2O 和集流体之间的直接接触以及 Cu2O/聚合物粘合剂非活性界面的减少也被认为是提高高倍率性能的原因。
Highly ordered porous Cu2O film is electrodeposited on copper foil through a self-assembled polystyrene sphere template. Compared with the dense Cu2O film and the octahedral Cu2O powder, the ordered porous Cu2O film exhibits an improved electrochemical cycling stability. The capacity of the porous Cu2O film can maintain 336mAhg−1and 213mAhg−1after 50 cycles at the rate of 0.1C and 5C, respectively. The reversible capacity holds 63.4% as the discharge–charge rate even increases by 50 times. The enhanced high rate properties of the ordered porous film should be attributed to the sufficient contact surface of Cu2O/electrolyte and the short diffusion length of Li+. Moreover, the direct contact between Cu2O and current collector and the decreasing inactive interfaces of Cu2O/polymer binder are also suggested as being responsible for the enhanced high rate property.