| 项目编号: | 1748414
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| 项目名称: | EAGER: COLLABORATIVE RESEARCH: Reversible Solid Electrolyte Interface (SEI) Layers for Advanced Li-ion Batteries and Beyond |
| 作者: | Fei Gao
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| 承担单位: | University of Michigan Ann Arbor
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| 批准年: | 2017
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| 开始日期: | 2017-08-01
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| 结束日期: | 2019-01-31
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| 资助金额: | 70000
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | solid-electrolyte
; solid-electrolyte interface layer
; formation
; research project
; lithium ion battery
; electrolyte
; testing silicon film electrode
; silicon surface
; new solid-electrolyte interface formation mechanism
; conversion system
; concentrated electrolyte
; research group
; various concentrated electrolyte
; energy-themed educational activity
; bulk electrolyte
; lithium cation
; theoretical simulation
; lithium ion
; design solution
; research outcome
; material characterization
; stability limit
; coordination environment
; intensive electrochemical characterization
; long-term cycling stability
; electrode material-electrolyte reaction
; performance limitation
; silicon/electrolyte interface
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| 英文摘要: | Although lithium ion batteries have been commercialized for consumer electronics, they still fall far behind the requirements needed for batteries used in long-range electric vehicles and large-scale renewable energy storage. There is a need to improve the energy densities of lithium ion batteries and to research "beyond lithium ion" battery technologies that employ high-capacity but low-cost materials such as silicon, oxygen or sulfur electrodes. Almost all battery chemistries in electrochemical energy storage cells operate beyond the stability limits of the electrolytes, substance that produce an electrically conducting solution when dissolved. These battery cells operate in many cases because electrode material-electrolyte reactions result in the formation of a protective material layer on the electrode material, called a solid-electrolyte interface layer. The mechanical and chemical reactivity properties of this protective layer dictate the energy, power and the long-term cycling stability of the battery system; however, fundamental knowledge on the formation of this protective layer is lacking. This research project is investigating a new solid-electrolyte interface layer formation mechanism that will enable design solutions for many of the performance limitations of batteries. The research outcomes of this project are being integrated into energy-themed educational activities for students to study science, technology, engineering and mathematics (STEM) subjects.
This collaborative research project between research groups at the University and Arkansas and the University of Michigan seeks a fundamentally new solid-electrolyte interface formation mechanism by using silicon/electrolyte interfaces as a model system. Intensive electrochemical characterizations are being conducted by testing silicon film electrodes in various concentrated electrolytes to understand the coordination environments of lithium cations in the bulk electrolytes and its implications on the solid-electrolyte interface layer compositions. In situ atomic force microscopy is being employed to probe the formation and evolution of solid-electrolyte interface layers on silicon surfaces in a cell. Theoretical simulations are being combined with material characterizations to advance the fundamental understanding of solid-electrolyte interface layers derived from concentrated electrolytes. The research project is designed to test a new theory to control the interfacial properties between electrodes and electrolyte, one that is broadly applicable to battery technologies and many other energy storage and conversion systems. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89578
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Fei Gao. EAGER: COLLABORATIVE RESEARCH: Reversible Solid Electrolyte Interface (SEI) Layers for Advanced Li-ion Batteries and Beyond. 2017-01-01.
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