Premium
Improved potassium ion storage performance of graphite by atomic layer deposition of aluminum oxide coatings
Author(s) -
Chen JinFeng,
He XiaoDong,
Li DeJun,
Feng JianMin
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5141
Subject(s) - graphite , anode , materials science , atomic layer deposition , energy storage , layer (electronics) , lithium (medication) , intercalation (chemistry) , deposition (geology) , electrochemistry , electrode , chemical engineering , metallurgy , inorganic chemistry , nanotechnology , chemistry , paleontology , sediment , engineering , biology , medicine , power (physics) , physics , quantum mechanics , endocrinology
Summary In the context of large scale and low‐cost energy storage, the emerging potassium‐ion batteries (PIBs) are one potential energy storage system. Graphite, a commercial anode material widely used in lithium‐ion batteries (LIBs), can be directly applied to PIBs through forming the stage I graphite intercalation compound (KC 8 ). However, the dramatic volume expansion during the formation of KC 8 can result in poor cycling performance. In this work, one Al 2 O 3 atomic layer coated on the surface of graphite via atomic layer deposition (ALD) process, aiming to construct a stable solid electrode interface and enhance the performance of graphite anode in PIBs. The electrochemical performance analysis shows that the 20 cycles Al 2 O 3 deposited graphite have improved cycle stability of 223 mAh g −1 at 50 mA g −1 after 50 cycles compared with the raw graphite anode of 92 mAh g −1 .