Sandwich-like dual carbon layers coated NiO hollow spheres with superior lithium storage performances

Gan, Qingmeng1,2; Wu, Buchen1,2; Qin, Ning2,3; Chen, Jiali1,2; Luo, Wen2; Xiao, Dejun1; Feng, Jie4; Liu, Weilong1; Zhu, Youhuan2; Zhang, Peisen5

2020-05-20

10.1016/j.electacta.2020.136121

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

Transition metal oxides (e.g. NiO) have been considered as promising high-capacity anode in lithium ion batteries (LIBs). However, the low electronic conductivity and huge volume change during cycling lead to rapid capacity fading and poor rate capability. To solve those drawbacks, we design a sandwich-like dual carbon layers coated hollow structured NiO (C@NiO@NC). The NiO nanosheets are anchored on the surface of hollow carbon nanospheres and then coated with N-doped porous carbon layer, which confine them between two carbon shells. Such hierarchical architecture with high surface area increases the contact between the electrode and electrolyte, resulting in decreased Lithorn diffusion pathway. Moreover, the dual carbon layers enhance the electronic conductivity of C@NiO@NC and effectively buffer the volume changes of NiO during cycling. Therefore, this sample delivers a high capacity (1189 mA h g(-1) at 100 mA g(-1)), superior rate capability (420 mA h g(-1) at ultrahigh rate of 10000 mA g(-1)) and outstanding cycling stability (96.1% at 1000 mA g(-1) after 1000 cycles) when used as LIBs anode. The density functional theoretical calculation further proves the enhanced electronic conductivity and more energetic favorable capability of C@NiO@NC. This facile method can be extended to other transition-metal oxides with superior electrochemical performance. (c) 2020 Elsevier Ltd. All rights reserved.

Dual carbon later coating Sandwich-like structure Hollow sphere Outstanding cycling stability First principle theory

SCI ; EI

英语

通讯

National Nature Science Foundation of China[21671200] ; National Nature Science Foundation of China[21571189]

Electrochemistry

Electrochemistry

WOS:000526114100014

PERGAMON-ELSEVIER SCIENCE LTD

20201508388575

Doping (additives) ; Porous materials ; Transition metal oxides ; Density functional theory ; Electric conductivity ; Electrolytes ; Transition metals ; Nickel oxide ; Anodes ; Nanospheres ; Lithium-ion batteries

Metallurgy and Metallography:531 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries and Fuel Cells:702 ; Electronic Components and Tubes:714 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Solid State Physics:933 ; Materials Science:951

CHEMISTRY

Web of Science

1.Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
3.City Univ Hong Kong, Dept Mech Engn, 83 Tat Chee Ave, Hong Kong 999077, Peoples R China
4.Harbin Inst Technol, Sch Civil Engn, Harbin 150001, Peoples R China
5.Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Key Lab Colloid Interface & Chem Thermodynam, Beijing 100190, Peoples R China

Gan, Qingmeng,Wu, Buchen,Qin, Ning,et al. Sandwich-like dual carbon layers coated NiO hollow spheres with superior lithium storage performances[J]. ELECTROCHIMICA ACTA,2020,343.

Gan, Qingmeng.,Wu, Buchen.,Qin, Ning.,Chen, Jiali.,Luo, Wen.,...&Zhang, Peisen.(2020).Sandwich-like dual carbon layers coated NiO hollow spheres with superior lithium storage performances.ELECTROCHIMICA ACTA,343.

Gan, Qingmeng,et al."Sandwich-like dual carbon layers coated NiO hollow spheres with superior lithium storage performances".ELECTROCHIMICA ACTA 343(2020).