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Co 0.5 Ni 0.5 MoO 4 Double‐Shelled Hollow Spheres with Enhanced Electrochemical Performance for Supercapacitors and Lithium‐Ion Batteries
Author(s) -
Li Lun,
Chen Wei,
Luo Wen,
Xiao Zhitong,
Zhao Yunlong,
Owusu Kwadwo Asare,
Liu Zhenhui,
Zhou Liang,
Mai Liqiang
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201801160
Subject(s) - supercapacitor , materials science , calcination , capacitance , lithium (medication) , electrochemistry , chemical engineering , electrode , transition metal , nanotechnology , catalysis , chemistry , medicine , engineering , endocrinology , biochemistry
Transition metal molybdates represent a promising family of electrode materials for supercapacitors and lithium‐ion batteries (LIBs). Herein, Co 0.5 Ni 0.5 MoO 4 double‐shelled hollow spheres (DSHSs) are synthesized using a simple and scalable spray‐drying method followed by calcination in air. Benefited from the unique hollow structure as well as the coexistence of Co and Ni, the as‐synthesized Co 0.5 Ni 0.5 MoO 4 DSHSs exhibit an improved pseudocapacitive property with a specific capacitance of 731 F g −1 at 0.5 A g −1 and a high capacitance retention of 91% (10 A g −1 ) after 5000 cycles. In addition, the obtained Co 0.5 Ni 0.5 MoO 4 DSHSs also manifest a high specific capacity (900 mAh g −1 at 0.2 A g −1 after 50 cycles) and an excellent cyclability (756 mAh g −1 at 1 A g −1 after 1000 cycles) for lithium storage. This rational design on both component and structure provides an effective strategy to achieve high‐performance supercapacitors and LIBs.