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Aqueous Dual‐Ion Battery Based on a Hematite Anode with Exposed {1 0 4} Facets
Author(s) -
Tao Yaping,
Ding Chunxia,
Tan Deming,
Yu Feng,
Wang Faxing
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801918
Subject(s) - anode , aqueous solution , battery (electricity) , cathode , electrochemistry , electrolyte , materials science , hydroxide , inorganic chemistry , potassium ion battery , alkaline battery , redox , ion , lithium (medication) , chemical engineering , lithium vanadium phosphate battery , electrode , chemistry , organic chemistry , quantum mechanics , engineering , endocrinology , medicine , power (physics) , physics
The aqueous rechargeable lithium battery (ARLB) is one of the most promising devices for large‐scale grid applications. Currently, a key issue for ARLBs is to develop promising anode materials with favorable electrochemical performances. Here, for the first time, we demonstrate an aqueous battery that utilizes the reversible redox reaction with hydroxide ions (OH − ) in the hematite (Fe 2 O 3 ) anode and a commercial Li ion intercalation compound in neutral solution as the cathode. The fabricated aqueous battery displays a reversible capacity of 92 mAh g − 1 . The morphology of the used Fe 2 O 3 anode with exposed {1 0 4} facets for this aqueous battery is unique and attractive. Importantly, with the dual‐pH neutral–alkaline hybrid electrolyte, many excellent anode materials that previously could only work in alkaline electrolytes can now be successfully combined with commercial cathodes in neutral solutions, which may significantly enrich the range of anode materials for ARLBs. In addition, the reported battery configuration can be extended to other aqueous batteries beyond Li‐ion ones with lower cost.