title: Accurate hierarchical control of hollow crossed NiCo2O4 nanocubes for superior lithium storage.
abstract: An effective approach of simultaneously coordinating etching and precipitation reactions is employed to prepare hollow crossed NiCo2O4 nanocubes as anode materials for lithium-ion batteries. Firstly, amorphous hollow (NiCox)O(OH) nanoboxes form uniformly, and subsequent calcination results in the formation of NiCo2O4 nanocubes that exhibit a stable reversible capacity of 1160 mA h g(-1) at constant current density of 200 mA g(-1) with capacity retention of over 91.1% after 200 cycles. The unique hollow structure can shorten the Li-ion diffusion path, which benefits the rate of performance. Furthermore, the hollow structure offers a sufficient void space to alleviate the mechanical stress caused by volume change. Additionally, the multi-element characteristics of active materials allow the volume change to take place in a stepwise manner. Therefore, hollow crossed NiCo2O4 nanocube electrodes exhibit excellent electrochemical performance. This method is simple and of low cost, which may open a new avenue for fast synthesis of hollow crossed structural nano-functional materials for energy storage, catalysts, sensors and other new applications.
authors.affiliation: School of Chemistry Science and Engineering, Yunnan University, Kunming 650091, Yunnan, China. guohongcom@126.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Guo
authors.forename: Lixiang
authors.initials: L
authors.lastname: Liu
authors.forename: Tingting
authors.initials: T
authors.lastname: Li
authors.forename: Weiwei
authors.initials: W
authors.lastname: Chen
authors.forename: Jiajia
authors.initials: J
authors.lastname: Liu
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Guo
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Guo