| 项目编号: | 1706681
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| 项目名称: | IN-SITU RAMAN SPECTROSCOPY STUDY OF LITHIUM-AIR BATTERY WITH BI-CONTINUOUS SERS-ACTIVE ELECTRODE AND MEMBRANE |
| 作者: | Yu Zhu
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| 承担单位: | University of Akron
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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: | 2020-07-31
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| 资助金额: | 299955
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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: | lithium-air battery
; lithium-air
; electrode
; bi-continuous
; bi-continuous electrode
; air-cathode
; fundamental understanding
; battery replacement
; engineering solution
; electrolyte solution
; intermediate compound
; battery design
; template masking
; particular interest
; promising high-density energy storage system
; improved understanding
; yu institution
; transition metal interstitial compound
; electrolyte/electrode stability
; raman signal
; experimental investigation
; pristine chemical vapor
; surface-enhanced raman spectroscopy
; trace intermediate compound
; cathode
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| 英文摘要: | 1706681
PI: Zhu, Yu
Institution: University of Akron
Lithium-air batteries are promising high-density energy storage systems. The theoretical energy density of lithium-air batteries is comparable with that of gasoline. However, the current lithium-air battery systems suffer from slow and irreversible electrochemical reactions on the cathode and in the electrolyte solution. A fundamental understanding of the reactions taking place in these systems is essential for designing better electrodes and electrolytes that improve energy storage capacity and the number of cycles before battery replacement. The experimental investigations seek to monitor in real time chemical species on the cathode of lithium-air batteries to provide a better understanding of the chemical reaction mechanisms that can lead to improved battery designs.
The proposal aims at exploring the reactions taking place on the cathode of lithium-air batteries using in-situ Raman spectroscopy. The use of polymer templates to fabricate well- organized bi-continuous electrodes made of pristine chemical vapor deposited graphene, gold, or transition metal interstitial compounds is proposed. To enhance the Raman signal, the bi-continuous electrodes will be modified by the adsorption of uniform and regularly assembled gold nanoparticles using either controlled evaporation or template masking. The modified electrodes may allow the detection of trace intermediate compounds by surface-enhanced Raman spectroscopy (SERS). In order to detect the intermediates and products formed in the electrolyte solution, a SERS-active insulating membrane with similar structure as the electrode will be applied to the assembled lithium-air battery. A suite of characterization tools (including Raman, FTIR, TEM, XPS, and XRD) will enable investigation of the materials on the air-cathode and electrolyte solution. Of particular interest are intermediate compounds formed during the charging and discharging processes that will enable addressing fundamental material challenges associated with electrolyte/electrode stability. The studies may provide an improved understanding of lithium-air battery cathode reaction mechanisms and may lead to engineering solutions for high performance, reversible lithium-air batteries. In addition to the training of graduate and undergraduate students, outreach efforts are proposed that will include a Science Olympiad weekend for students in grades 4-6 and activities through the ACS SEED program targeting economically disadvantaged high school students in the Akron, OH, area. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/89615
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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: | |
Yu Zhu. IN-SITU RAMAN SPECTROSCOPY STUDY OF LITHIUM-AIR BATTERY WITH BI-CONTINUOUS SERS-ACTIVE ELECTRODE AND MEMBRANE. 2017-01-01.
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