Free-standing and binder-free lithium-ion electrodes based on robust layered assembly of graphene and Co3O4 nanosheets
Free-standing and binder-free lithium-ion electrodes based on robust layered assembly of graphene and Co3O4 nanosheets
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基于石墨烯和 Co3O4 纳米片的坚固层状组装的独立式无粘合剂锂离子电极
DOI：
10.1039/c3nr01392h
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Lin, Chucheng
中科院分区：
文献类型：
--
作者：
Wang, Ronghua;Xu, Chaohe;Lin, Chucheng
通过真空过滤和热处理工艺制备了无粘结剂的Co 3 O 4/石墨烯自支撑薄膜，其中片状Co 3 O 4和石墨烯通过静电相互作用组装成坚固的层状分级结构。Co 3 O 4与石墨烯之间的形态相容性以及强烈的界面相互作用显著促进了界面电子和锂离子的传输。当用作锂离子电池的无粘合剂和自立式电极时，混合膜提供高比容量（基于总电极重量，在100 mA g（-1）下类似于1400 mA h g（-1））、增强的倍率性能和优异的循环稳定性（在100次循环后在200 mA g（-1）下类似于1200 mA h g（-1））。这种有效的策略将为高性能锂离子电池的许多其他复合电极的设计和合成提供新的见解。
Free-standing and binder-free Co3O4/graphene films were fabricated through vacuum filtration and thermal treatment processes, in which sheet-like Co3O4 and graphene were assembled into a robust lamellar hierarchical structure via electrostatic interactions. The morphological compatibility coupled with strong interfacial interactions between Co3O4 and graphene significantly promoted the interfacial electron and lithium ion transport. When used as a binder-less and free-standing electrode for lithium-ion batteries, the hybrid film delivered a high specific capacity (similar to 1400 mA h g(-1) at 100 mA g(-1) based on the total electrode weight), enhanced rate capability and excellent cyclic stability (similar to 1200 mA h g(-1) at 200 mA g(-1) after 100 cycles). This effective strategy will provide new insight into the design and synthesis of many other composite electrodes for high-performance lithium-ion batteries.