Reduced graphene oxide promoted assembly of graphene@polyimide film as a flexible cathode for high-performance lithium-ion battery.
Reduced graphene oxide promoted assembly of graphene@polyimide film as a flexible cathode for high-performance lithium-ion battery.
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还原氧化石墨烯促进石墨烯@聚酰亚胺薄膜的组装作为高性能锂离子电池的柔性阴极
作者：
有机羰基聚合物已逐渐被用作锂离子电池(Lib)的正极。然而，由于电导率低，大多数有机聚合物都存在可逆容量低、倍率性能差、循环不稳定等局限性。为了缓解这一限制，我们提出了一种基于聚酰亚胺(PI)/石墨烯电活性材料包覆还原氧化石墨烯的策略，通过溶剂热和真空过滤工艺制备柔性薄膜(G@PI/RGO)。作为LiB的柔性正极，它在30 mA g−1下的可逆容量为198 mA h g−1，在6000 mA g−1的大电流密度下提供了100 mA h g−1的优异倍率性能，甚至还有超长循环性能(2500次循环，容量保持率为70%)。这种优异的性能导致了一种特殊的层结构，在这种结构中，电活性PI被锚定并被石墨烯包裹。该合成方法可进一步应用于构建其他高性能的有机储能电极。采用溶剂热反应和碳化反应相结合的方法制备了G@PI/RGO。它具有良好的机械柔韧性和高导电性，直接用作LiB的阴极时表现出优异的性能。
Organic carbonyl polymers have been gradually used as the cathode in lithium-ion batteries (LIB). However, there are some limits in most organic polymers, such as low reversible capacity, poor rate performance, cycle instability, etc., due to low electrochemical conductivity. To mitigate the limits, we propose a strategy based on polyimide (PI)/graphene electroactive materials coated with reduced graphene oxide to prepare a flexible film (G@PI/RGO) by solvothermal and vacuum filtration processes. As a flexible cathode for LIB, it provides a reversible capacity of 198 mA h g−1 at 30 mA g−1 and excellent rate performance of 100 mA h g−1 at high current densities of 6000 mA g−1, and even a super long cycle performance (2500 cycles, 70% capacity retention). The excellent performance results in a special layer structure in which the electroactive PI was anchored and coated by the graphene. The present synthetic method can be further applied to construct other high-performance organic electrodes in energy storage. G@PI/RGO is prepared by a combination of solvothermal reaction and carbonization. With good mechanical flexibility and high conductivity, it shows excellent performance when directly used as the cathode for LIB.
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影响因子：
29.4
作者：
Amin, Kamran;Meng, Qinghai;Wei, Zhixiang
通讯作者：
Wei, Zhixiang
影响因子：
9.5
作者：
Cao, Shaomei;Feng, Xin;Shi, Liyi
通讯作者：
Shi, Liyi
聚酰亚胺：有前途的储能材料
影响因子：
16.6
作者：
Song, Zhiping;Zhan, Hui;Zhou, Yunhong
通讯作者：
Zhou, Yunhong
影响因子：
15
作者：
HUMMERS, WS;OFFEMAN, RE
通讯作者：
OFFEMAN, RE
影响因子：
29.4
作者：
Han, Xiaoyan;Chang, Caixian;Sun, Jutang
通讯作者：
Sun, Jutang