Flexible CuO Nanosheets/Reduced-Graphene Oxide Composite Paper: Binder-Free Anode for High-Performance Lithium-Ion Batteries
Flexible CuO Nanosheets/Reduced-Graphene Oxide Composite Paper: Binder-Free Anode for High-Performance Lithium-Ion Batteries
复制标题
柔性氧化铜纳米片/还原氧化石墨烯复合纸：高性能锂离子电池的无粘合剂阳极
DOI：
10.1021/am403136e
复制
发表时间：
2013-10-09
影响因子：
9.5
通讯作者：
Peng, Xinsheng
中科院分区：
文献类型：
--
作者：
Liu, Yu;Wang, Wei;Peng, Xinsheng
采用真空过滤和水热还原工艺制备了柔性独立CuO纳米片/还原氧化石墨烯（r-GO）杂化层纸。在氧化石墨烯层内均匀嵌入CuO纳米孔，形成了独特的三维纳米孔网络。该复合材料作为无粘结剂的锂离子电池阳极，循环50次后的比容量为736.8 mA h g(-1)，具有良好的循环保持性能。这远远高于原始CuO NSs的219.1 mA h g（-1）和r-GO薄膜在相同电流密度为67 mA g（-1）时的60.2 mA h g（-1）。纳米孔结构提供了高效的导电通道，有利于电解质的渗透，缓冲了锂化和氧化石墨烯过程中的体积变化，从而产生了高电容和优异的循环性能。CuO NSs/r-GO纸具有优异的电化学性能，有望成为锂离子电池柔性无粘结剂阳极。
Flexible free-standing CuO nanosheets (NSs)/reduced graphene oxide (r-GO) hybrid lamellar paper was fabricated through vacuum filtration and hydrothermal reduction processes. A unique three-dimensional nanoporous network was achieved with CuO NSs homogeneously embedded within the r-GO layers. This hybrid lamellar composite paper was examined as a binder-free anode for lithium ion batteries, and demonstrated excellent cyclic retention with the specific capacity of 736.8 mA h g(-1) after 50 cycles. This is much higher than 219.1 mA h g(-1) of the pristine CuO NSs and 60.2 mA h g(-1) of r-GO film at the same current density of 67 mA g(-1). The high capacitance and excellent cycling performance were generated from the integrated nanoporous structure compose of CuO NSs spaced r-GO layers, which offered an efficient electrically conducting channels, favored electrolyte penetration, and buffered to the volume variations during the lithiation and delithiation process. These outstanding electrochemical capabilities of CuO NSs/r-GO paper holds great promise for flexible binder-free anode for lithium ion batteries.