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Synthesis and Electrochemical Characterization of Lithium Carboxylate 2D Compounds as High‐Performance Anodes for Li−Ion Batteries
Author(s) -
Zhang Haitao,
Lin Yichao,
Chen Liang,
Wang Deyu,
Hu Hefeng,
Shen Cai
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901965
Subject(s) - anode , lithium (medication) , electrochemistry , carboxylate , graphene , materials science , current density , ion , conjugated system , electrode , nanotechnology , chemistry , organic chemistry , polymer , composite material , medicine , endocrinology , physics , quantum mechanics
The large‐scale utilization of Li‐ion batteries in electric vehicles requires urgent development of cost‐effective and high‐performance electrode materials. Herein, we report the synthesis of conjugated carboxylate (Li 4 C 8 H 2 O 6 ) and non‐conjugated carboxylate (Li 4 C 4 H 2 O 6 ) by using a simple solvothermal method and its utilization as anode materials in Li‐ion batteries. Atomic force microscopy reveals that as‐prepared Li 4 C 8 H 2 O 6 and Li 4 C 4 H 2 O 6 possess a sheet‐like morphology with a thickness of 3–5 nm. An initial discharge capacities of 251.7 mAh/g and 251.6 mAh/g at a current density of 50 mA/g can be obtained for Li 4 C 8 H 2 O 6 and Li 4 C 4 H 2 O 6, respectively. In addition, Li 4 C 8 H 2 O 6 is combined with a small amount (5 wt. %) of graphene and nano‐Si to enhance the cyclic performance and specific capacity. Consequently, Li 4 C 8 H 2 O 6 /graphene and Li 4 C 8 H 2 O 6 /nano‐Si composites rendered a high discharge capacity of 350 mAh/g and 240 mAh/g, respectively, at a relatively higher current density of 100 mA/g. These results demonstrate that lithium carboxylates are promising anode materials for Li‐ion batteries.