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In Situ Synthesis of ZnMn 2 O 4 –ZnO–C and ZnMn 2 O 4 –C Nanohybrids as High Performance Lithium‐Ion Battery Anodes
Author(s) -
Li Guangda,
Wang Yuyan,
Yang Lishan,
Ma Wanyong,
Wang Meng
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301319
Subject(s) - anode , lithium (medication) , chemistry , electrode , battery (electricity) , current density , analytical chemistry (journal) , chemical engineering , nanotechnology , inorganic chemistry , materials science , organic chemistry , medicine , physics , quantum mechanics , engineering , endocrinology , power (physics)
ZnMn 2 O 4 –ZnO–C nanohybrids have been synthesized by means of a simple carbonthermal reduction reaction between ZnMnO 3 and acetylene black. ZnMn 2 O 4 –C nanohybrids are obtained by further washing with NaOH solution. The reversible discharge capacity of the ZnMn 2 O 4 –ZnO–C nanohybrids can reach 620 mA h g –1 at a current density of 100 mA g –1 and 520 mA h g –1 at 800 mA g –1 after 100 cycles. More importantly, ZnMn 2 O 4 –C shows better conductivity along with better rate performance after the removal of ZnO. The as‐prepared ZnMn 2 O 4 –C nanohybrids show a high specific capacity of approximately 750 mA h g –1 at a current density of 100 mA g –1 after 100 cycles and excellent rate performance. The reaction involved in the discharge/charge processes are discussed on the basis of ex situ high‐resolution transmission of the electrode materials. The conclusions will be of benefit in the design and exploration of future binary transition‐metal oxide anode materials for lithium‐ion batteries.