Open AccessMultiangular Rod-Shaped Na0.44MnO2 as Cathode Materials with High Rate and Long Life for Sodium-Ion Batteries
Author(s) -
Qiannan Liu,
Zhe Hu,
Mingzhe Chen,
Qinfen Gu,
Yuhai Dou,
Ziqi Sun,
Shulei Chou,
Shi Xue Dou
Publication year - 2016
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.6b13830
Subject(s) - materials science , cathode , electrolyte , microstructure , sodium , ion , chemical engineering , sintering , electrode , rod , microemulsion , composite material , metallurgy , organic chemistry , electrical engineering , medicine , pulmonary surfactant , chemistry , alternative medicine , pathology , engineering
The tunnel-structured Na 0.44 MnO 2 is considered as a promising cathode material for sodium-ion batteries because of its unique three-dimensional crystal structure. Multiangular rod-shaped Na 0.44 MnO 2 have been first synthesized via a reverse microemulsion method and investigated as high-rate and long-life cathode materials for Na-ion batteries. The microstructure and composition of prepared Na 0.44 MnO 2 is highly related to the sintering temperature. This structure with suitable size increases the contact area between the material and the electrolyte and guarantees fast sodium-ion diffusion. The rods prepared at 850 °C maintain specific capacity of 72.8 mA h g -1 and capacity retention of 99.6% after 2000 cycles at a high current density of 1000 mA g -1 . The as-designed multiangular Na 0.44 MnO 2 provides new insight into the development of tunnel-type electrode materials and their application in rechargeable sodium-ion batteries.
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