Premium
A Single‐Step Hydrothermal Route to 3D Hierarchical Cu 2 O/CuO/rGO Nanosheets as High‐Performance Anode of Lithium‐Ion Batteries
Author(s) -
Wu Songhao,
Fu Gaoliang,
Lv Weiqiang,
Wei Jiake,
Chen Wenjin,
Yi Huqiang,
Gu Meng,
Bai Xuedong,
Zhu Liang,
Tan Chao,
Liang Yachun,
Zhu Gaolong,
He Jiarui,
Wang Xinqiang,
Zhang Kelvin H. L.,
Xiong Jie,
He Weidong
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201702667
Subject(s) - anode , materials science , graphene , hydrothermal circulation , nanostructure , lithium (medication) , oxide , chemical engineering , nanotechnology , electrode , metallurgy , chemistry , medicine , endocrinology , engineering
As anodes of Li‐ion batteries, copper oxides (CuO) have a high theoretical specific capacity (674 mA h g −1 ) but own poor cyclic stability owing to the large volume expansion and low conductivity in charges/discharges. Incorporating reduced graphene oxide (rGO) into CuO anodes with conventional methods fails to build robust interaction between rGO and CuO to efficiently improve the overall anode performance. Here, Cu 2 O/CuO/reduced graphene oxides (Cu 2 O/CuO/rGO) with a 3D hierarchical nanostructure are synthesized with a facile, single‐step hydrothermal method. The Cu 2 O/CuO/rGO anode exhibits remarkable cyclic and high‐rate performances, and particularly the anode with 25 wt% rGO owns the best performance among all samples, delivering a record capacity of 550 mA h g −1 at 0.5 C after 100 cycles. The pronounced performances are attributed to the highly efficient charge transfer in CuO nanosheets encapsulated in rGO network and the mitigated volume expansion of the anode owing to its robust 3D hierarchical nanostructure.