Flexible Core/Shell Nanocable - Carbon Microfiber Hybrid Composite Electrodes for High-Performance Supercapacitors

柔性核/壳纳米电缆 - 用于高性能超级电容器的碳微纤维混合复合电极

• 批准号: 1358673
• 负责人: Xiaodong Li
• 金额: $ 23.34万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-31 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1358673&HistoricalAwards=false
• 关键词: Flexible; Core; Shell; Nanocable; Carbon

This award provides funding for synthesizing large quantities of conductive-core/transition-metal-oxide-shell nanocables on a highly flexible and strong carbon microfiber substrate. The primary goal of this work is to solve the three most critical limitations in supercapacitors for portable electronic devices and wearable electronics, i.e., inflexibility, low specific capacitance, and electrode failure resulting from ion insertion/extraction during charge/discharge cycling. The electrical conductive-cores will be used to support redox active transition-metal-oxide-shells with highly electrolytic accessible surface area and also to provide reliable electrical connections to the shells, enabling full utilization of transitional-metal-oxide and fast electronic and ionic conduction through the electrode. The carbon microfibers will offer not only flexibility and mechanical strength to the electrode but also more surface area than a flat conductive substrate for growing more nanocables, which further improves the specific capacitance and energy density. This research program will study the formation mechanisms of the core/shell nanocables grown on flexible carbon microfibers and the electrochemical energy storage mechanisms of the core/shell ? carbon microfiber hybrid composite electrodes. High throughput manufacturing of such composite electrodes with high flexibility, high specific capacitance, high energy density, high power density, fast charging/discharging rate, and long cycle life will be explored through the novel hierarchical nano/micro architecture design. If successful, the results of this research will contribute to a better understanding of the manufacturing-structure-property-function of the core/shell ? carbon microfiber hybrid composites and their electrodes. This research has the potential to change the conventional concepts for flexible electrode design and to significantly impact existing electrode manufacturing technologies. The research advances made through this project will generate new knowledge that will be introduced to undergraduate and graduate students through existing courses and the research activities will be used as an educational platform for students at all levels to learn about nanomanufacturing and nanotechnology-enabled energy storage systems.

该奖项为合成大量的高度灵活且强大的碳超细纤维底物上的大量导电核/过渡金属氧化纳米胶质提供了资金。这项工作的主要目的是解决可移植电子设备和可穿戴电子设备的超级电容器中的三个最关键限制，即，在电荷/放电循环期间，由离子插入/提取导致的插入/萃取导致的不灵活性，低电容和电极故障。电导导电核将用于支撑具有高度电解性可访问表面积的氧化还原主动过渡金属氧化物，并为壳提供可靠的电气连接，从而使过渡金属氧化物以及通过电极通过电极充分利用过渡性金属氧化物以及快速的电子和离子传导。碳超细纤维不仅将为电极提供柔韧性和机械强度，而且比扁平导电基板的表面积更大，用于生长更多的纳米剂，从而进一步提高了特定的电容和能量密度。该研究计划将研究在柔性碳超细纤维和核心/壳的电化学能源存储机制上生长的核/壳纳米材料的形成机制？碳超细纤维混合动力电极。将通过新型的层次纳米/微观体系结构设计来探索这种复合电极的高吞吐量制造，具有高灵活性，高电容，高功率密度，高功率密度，快速充电/放电速率以及长周期寿命。如果成功，这项研究的结果将有助于更好地理解核心/壳的制造业实质性功能吗？碳超细纤维杂交复合材料及其电极。这项研究有可能改变柔性电极设计的常规概念，并显着影响现有的电极制造技术。通过该项目所做的研究进展将产生新知识，通过现有课程将向本科和研究生介绍，研究活动将被用作各级学生的教育平台，以了解纳米制造和纳米技术启用启用纳米技术的存储系统。