Recent progress in the electrolytes for improving the cycling stability of LiNi_0.5Mn_1.5O₄ high-voltage cathode

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• 作者：Yan-Rong Zhu ; Ting-Feng Yi
• 关键词：Lithium ; ion battery ; Electrolyte ; Additive ; Electrochemical property
• 刊名：Ionics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：22
• 期：10
• 页码：1759-1774
• 全文大小：5,026 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760
• 卷排序：22

文摘

High-voltage spinel LiNi_0.5Mn_1.5O₄ has been considered one of the most promising cathode materials for lithium-ion power batteries used in electrical vehicles (EVs) or hybrid electrical vehicles (HEVs) because the high voltage plateau at around 4.7 V makes its energy density (658 Wh kg−1) 30 and 25 % higher than that of conventional pristine spinel LiMn₂O₄ (440 Wh kg−1) or olivine LiFePO₄ (500 Wh kg−1) materials, respectively. Unfortunately, LiNi_0.5Mn_1.5O₄-based batteries with LiPF₆-based carbonate electrolytes always suffer from severe capacity deterioration and poor thermostability because of the oxidization of organic carbonate solvents and decomposition of LiPF₆, especially at elevated temperatures and water-containing environment. The major goal of this review is to highlight the recent advancements in the development of advanced electrolytes for improving the cycling stability and rate capacity of LiNi_0.5Mn_1.5O₄-based batteries. Finally, an insight into the future research and further development of advanced electrolytes for LiNi_0.5Mn_1.5O₄-based batteries is discussed.