STTR Phase I: Manganese Oxide-Carbon Nanosheet Anodes for Extreme High Power Lithium Ion Batteries

这个小型企业技术转让(STTR)项目更广泛的影响/商业潜力是改进的锂离子电池的进步。该项目将评估新的电池化学，以实现比目前全球储能市场上更快的充电速度。这种高功率密度的电池将迎合当前锂离子电池技术严重不足的一个主要新兴电池领域。这项创新的成功开发将为当前和未来的应用提供好处。显然，大规模部署一种显著优越的储能设备将在许多应用和产品中加速摆脱化石燃料，从而产生显著的社会效益。例如，基于拟议技术的可行的再生制动储能技术将极大地减少地铁列车的用电量，同时减少二氧化碳排放。这一STTRI期项目旨在解决储能材料中微结构-性能关系的核心问题，回答有关电荷载体如何在氧化锰-碳纳米复合阳极中以可逆或不可逆的方式高速储存的一系列基本问题。在传统的LIBS中，是石墨基的阳极限制了充电速度，随着电流的增加，灾难性的锂金属电镀和树枝晶生长发生。预计许多现有的关于阳极快速性的“石墨继承”范例将被废除，或被提议的基于廉价的大麻衍生碳纳米片和纳米结构锰氧化物阳极的高功率锂离子电池设计方法所重新定义。更清楚地了解这类纳米复合材料中的合成-结构-性能关系将具有广泛的科学和技术意义。研究和开发活动将专注于结构优化和制造可伸缩性，以及接近商用的邮袋单元外形因素的制造和测试，以证明拟议技术的设备级性能和商业可行性。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact/commercial potential of this Small Business Technology Transfer (STTR) project is the advancement of improved lithium ion batteries. The project will evaluate new battery chemistry enabling more rapid charging rates then currently available in the worldwide energy storage marketplace. Such high power density batteries would cater to a major emerging battery segment where current lithium ion battery technologies fall dramatically short. Successful development of this innovation will provide benefits to both current and future applications. Clearly, large scale deployment of a markedly superior energy storage device will have significant societal benefits by accelerating the move away from fossil fuel in many applications and products. For instance, a viable regenerative braking energy storage technology based on the proposed technology would result in a tremendous reduction in electricity used by subway trains, with a concomitant reduction of CO2 emissions. This STTR Phase I project proposes to address the core of the microstructure - performance relations in energy storing materials, answering a series of fundamental questions regarding how a charge carrier is reversibly or irreversibly stored at high rates in manganese oxide - carbon nanocomposite anodes. In conventional LIBs, it is the graphite-based anode that limits charging rates, with catastrophic lithium metal plating and dendrite growth occurring at increased currents. It is expected that many of the existing "Graphite - Inherited" paradigms regarding fast rate in anodes would be done away with, or substantially redefined with the proposed approach for designing high power lithium ion batteries based on an inexpensive hemp-derived carbon nanosheets and nanostructured manganese oxide anodes. A much clearer understanding of the synthesis - structure - property relations in such nanocomposites will have wide-reaching scientific and technological implications. Research and development activities will focus on structural optimization and manufacturing scalability along with fabrication and testing of near-commercial pouch cell form factors in order to demonstrate device-level performance and commercial viability of the proposed technology.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.