ZnO Nanomembrane/Expanded Graphite Composite Synthesized by Atomic Layer Deposition as Binder-Free Anode for Lithium Ion Batteries,ACS Applied Materials & Interfaces

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ZnO Nanomembrane/Expanded Graphite Composite Synthesized by Atomic Layer Deposition as Binder-Free Anode for Lithium Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-10-24 00:00:00 , DOI: 10.1021/acsami.7b11735
Yalan Li _{1,

2} , Yuting Zhao ₂ , Gaoshan Huang ₂ , Borui Xu ₂ , Bing Wang ₂ , Ruobing Pan ₂ , Chuanling Men ₁ , Yongfeng Mei ₂

Affiliation

A zinc oxide (ZnO)/expanded graphite (EG) composite was successfully synthesized by using atomic layer deposition with dimethyl zinc as the zinc source and deionized water as the oxidant source. In the composite structure, EG provides a conductive channel and mechanical support to ZnO nanomembranes, which effectively avoids the electrode pulverization caused by the volume change of ZnO. The anodes made from the flexible composite films without using binder, conductive agent, and current collector show high stable capacities especially for that with a moderate ZnO concentration. The highest capacity stayed at 438 mAh g^–1 at a current rate of 200 mA g^–1 after 500 cycles. The good performance is considered to be due to the co-effects of the high capacity of ZnO and the support of the EG framework. Such composite structures may have great potential in low-cost and flexible batteries.

中文翻译：

原子层沉积作为锂离子电池无粘结剂阳极合成的ZnO纳米膜/膨胀石墨复合材料

以二甲基锌为锌源，用去离子水为氧化剂源，通过原子层沉积法成功合成了氧化锌（ZnO）/膨胀石墨（EG）复合材料。在复合结构中，EG为ZnO纳米膜提供了导电通道和机械支撑，有效地避免了ZnO体积变化引起的电极粉碎。由柔性复合膜制成而未使用粘合剂，导电剂和集电器的阳极显示出高稳定容量，尤其是对于中等ZnO浓度而言。最高容量维持在438毫安克^-1处的200毫安g的电流速率^-1500个周期后。良好的性能被认为是由于ZnO的高容量和EG框架的支持共同作用的结果。这样的复合结构在低成本和柔性电池中可能具有巨大的潜力。

更新日期：2017-10-25

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