Constructing a charged-state Na-NiCl2 battery with NiCl2/graphene aerogel composite as cathode
Li, Yanpei1,2,3; Shi, Lei1,3; Gao, Xingpeng1,3; Wang, jingyi1,3; Hu, Yingying1,3; Wu, Xiangwei1,3; Wen, Zhaoyin1,3
2020
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Status已发表
DOIhttps://doi.org/10.1016/j.cej.2020.127853
Abstract

The hierarchical nickel chloride/reduced graphene oxide (NiCl2-rGO) aerogels are synthesized via a facile hydrothermal and freeze-drying methods using low-cost nickel chloride hexahydrate (NiCl2·6H2O) as raw material. The NiCl2-rGO hybrid aerogel structure enables the uniform distribution of lamellar NiCl2 on the three-dimensional (3D) cross-linked conductive graphene sheets. When employed as cathode for sodium-nickel chloride (Na-NiCl2) batteries, the as-obtained NiCl2-rGO aerogels exhibit excellent electrochemical performance with high reversible capacities (116 mAh g−1 after 50 cycles, 128 mAh g−1 in a fixed capacity window (20%–80% state of charge (SOC)) after 50 cycles), and a ultra-low polarization (0.05 V in the fixed capacity window). The outstanding performance of NiCl2-rGO aerogels can be attributed to the excellent conductivity of graphene. Moreover, the strong contact between NiCl2 and graphene sheets can effectively promote the transfer of electrons. Compared with traditional tubular Na-NiCl2 batteries, the molar ratio of Ni/NaCl of NiCl2-rGO aerogels can be decreased from 1.8 to the stoichiometric ratio (0.5). To the best of our knowledge, this work paves a perspective way for the first time to develop charged-state NiCl2-based cathodes with splendid performance for Na-NiCl2 batteries.

KeywordSodium-nickel chloride batteries Charged-state cathode Graphene aerogel Nickel chloride
MOST Discipline Catalogue工学 ; 工学::材料科学与工程(可授工学、理学学位)
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/126578
Collection物质科学与技术学院_博士生
物质科学与技术学院_特聘教授组_温兆银组
附属学校、幼儿园筹建部
大科学中心
Corresponding AuthorWu, Xiangwei; Wen, Zhaoyin
Affiliation1.Shanghai Institute of Ceramics, Chinese Academy of Sciences
2.ShanghaiTech University
3.University of Chinese Academy of Sciences
First Author AffilicationShanghaiTech University
Recommended Citation
GB/T 7714
Li, Yanpei,Shi, Lei,Gao, Xingpeng,et al. Constructing a charged-state Na-NiCl2 battery with NiCl2/graphene aerogel composite as cathode[J]. CHEMICAL ENGINEERING JOURNAL,2020.
APA Li, Yanpei.,Shi, Lei.,Gao, Xingpeng.,Wang, jingyi.,Hu, Yingying.,...&Wen, Zhaoyin.(2020).Constructing a charged-state Na-NiCl2 battery with NiCl2/graphene aerogel composite as cathode.CHEMICAL ENGINEERING JOURNAL.
MLA Li, Yanpei,et al."Constructing a charged-state Na-NiCl2 battery with NiCl2/graphene aerogel composite as cathode".CHEMICAL ENGINEERING JOURNAL (2020).
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