Stable Lithium Storage at Subzero Temperatures for High-capacity Co3O4@graphene Composite Anodes

时间:2021-04-23作者:浏览量:66


Stable Lithium Storage at Subzero Temperatures for High-capacity Co3O4@graphene Composite Anodes

作者:Tan, L (Tan, Liang)[ 1 ] ; Lan, XX (Lan, Xuexia)[ 1 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Liu, J (Liu, Jun)[ 1 ] ; Yuan, B (Yuan, Bin)[ 1 ] ; Zhu, M (Zhu, Min)[ 1 ]

 

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CHEMNANOMAT

 

: 7 : 1 : 61-70

DOI: 10.1002/cnma.202000547

 

出版年: JAN 2021

 

在线发表日期: NOV 2020

文献类型:Article

 

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摘要

Achieving high energy density and long-term stability at subzero temperatures remains one of the main challenges for the development of lithium-ion batteries. Shortcomings in energy density and stability mainly highlight on the increase in internal resistance and electrode polarization at subzero temperatures, which greatly affect the reversible capacities of lithium-ion batteries. In this work, a conversion type Co3O4@graphene (Co3O4@G) composite is prepared via a simple hydrothermal method and first evaluated at subzero temperatures. Benefitting from the especially suitable lithiation/delithiation potentials of Co3O4, ingenious nanostructure and high conductivity of graphene, the Co3O4@G anode exhibits much higher capacity retentions than intercalation- and alloying-type anodes at subzero temperatures, with 58.4% of room-temperature capacity retention at -30 degrees C for initial cycle and a highly stable reversible capacity of 605.0 mAh g(-1) (0.5 A g(-1)) for 600 cycles at -10 degrees C. Furthermore, very high capacities of similar to 920.4 mAh g(-1) (0.2 A g(-1)) can be maintained at 30 degrees C, and similar to 450.2 mAh g(-1) (0.5 A g(-1)) can be remained at -20 degrees C during alternating cycling. This work demonstrates that conversion-type Co3O4@G composites have superior extreme temperature lithium storage capabilities and can be viable Li-ion anode materials with fast and highly efficient ion/electron transport capacity at subzero operating temperatures.

 

关键词

作者关键词:Cobalt oxide; conversion reaction; subzero temperature; operating potential; Li-ion batteries

 

KeyWords Plus:LI-ION BATTERIES; REDUCED GRAPHENE OXIDE; PERFORMANCE; GRAPHITE; BEHAVIOR; NANOFIBERS; ELECTRODE; NANOCOMPOSITE; CONVERSION; MECHANISM

 

作者信息

通讯作者地址:

 

South China University of Technology South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

通讯作者地址: Hu, RZ (通讯作者)

 

显示更多         South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:

 

显示更多         [ 1 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址:msrenzonghu@scut.edu.cn

 

基金资助致谢

基金资助机构显示详情         授权号

National Natural Science Foundation of China (NSFC)

 

51671088

51822104

51621001

51831009

Guangzhou Science and Technology Plan Project

 

201904020018

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出版商

WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY

 

期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry; Science & Technology - Other Topics; Materials Science

 

Web of Science 类别:Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary