Premium
Molten Salt Derived Graphene‐Like Carbon Nanosheets Wrapped SiO x /Carbon Submicrospheres with Enhanced Lithium Storage †
Author(s) -
Zhang Qianliang,
Han Suping,
Tian Fang,
Feng Zhenyu,
Xi Baojuan,
Xiong Shenglin,
Qian Yitai
Publication year - 2021
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.202000647
Subject(s) - anode , graphene , lithium (medication) , carbon fibers , nanosheet , carbonization , molten salt , chemistry , chemical engineering , cathode , composite number , energy storage , graphite , salt (chemistry) , electrode , nanotechnology , inorganic chemistry , materials science , composite material , organic chemistry , medicine , power (physics) , physics , adsorption , quantum mechanics , engineering , endocrinology
Main observation and conclusion There is no doubt that SiO x and carbon composite is one of the promising anode materials for lithium‐ion batteries owing to its high capacity and rational cycling stability. Herein, we report a sol‐gel synthesis followed by molten salt carbonization route to fabricate graphene‐like carbon nanosheet wrapped SiO x /C submicrospheres (SiO x /C@2D‐C). The in ‐ situ generated carbon nanosheets under molten salt condition can further improve the electroconductivity, restrain the volumetric expansion and guarantee the structural integrity of the electrode. As a result, the as‐obtained SiO x /C@2D‐C delivers a discharge capacity of 559 mAh·g −1 at 0.5 A·g −1 after 200 cycles and 548 mAh·g –1 at 1.0 A·g −1 even after 1000 cycles. The full cell assembled with SiO x /C@2D‐C as anode and commercial LiFePO 4 as cathode can achieve an energy density of 200 Wh·kg −1 and maintain a capacity of 66.7% after 100 cycles with a working potential of 2.8 V. The approach is simple and cost effective, which is promising for mass production of SiO x ‐based materials for high energy LIBs.