EAGER: Laser Condensation of Graphene/Silicon Nanocomposites for Enhanced Electrochemical Properties

EAGER：激光凝聚石墨烯/硅纳米复合材料以增强电化学性能

基本信息

批准号：
1741100
负责人：
Gary Cheng
金额：
$ 5万
依托单位：
Purdue University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-06-01 至 2018-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1741100&HistoricalAwards=false
关键词：
EAGER Laser Condensation Graphene Silicon

项目摘要

Graphene-based composites (combinations of graphene and nanoparticles) are being adopted for versatile applications in field-effect transistors, sensors, supercapacitors, solar cells, Li-ion batteries, photocatalysts, and photoconductors. However, the performance of graphene composites is often plagued by the highly disordered microstructure, aggregation of nanoparticles, and loosely connected interfaces between graphene and nanoparticles. This EArly-concept Grant for Exploratory Research (EAGER) project seeks to elucidate the underlying mechanisms of enhanced electrochemical properties of graphene/silicon nanocomposites in their battery application through controlled laser processing. The laser assisted synthetic study will be complemented by theoretical modeling that seeks to predict the observed behavior. The educational activities associated with this project focus on hands-on outreach activities for middle school students on battery technology, coordinated through the Women in Engineering program at Purdue University.The overall goal of this research is to manufacture graphene/silicon nanocomposites by laser processing and understand the electrochemical behavior through atomistic modeling and electrochemical tests. Laser processed graphene/silicon nanoparticles display advantages in mechanical stability, material uniformity, and low contact resistance at graphene/nanoparticle interfaces. To develop a fundamental understanding of laser processing and the resulting properties, the research plan has two major objectives. The first objective is to study the interfacial engineering of laser processed nanocomposites through experiments and modeling. The second objective is to understand the electrochemical behaviors of graphene/silicon nanocomposites by performance tests, such as charging/discharging cycle stability and rate performance. The research will determine the optimum processing conditions for the enhanced electrochemical performance of graphene/silicon nanocomposite. The knowledge gained from this work will facilitate the manufacture of graphene based nanocomposites and contribute to the development of energy-storage materials.

基于石墨烯的复合材料（石墨烯和纳米颗粒的组合）在现场效应晶体管，传感器，超级电容器，太阳能电池，锂离子电池，光催化剂和光检查器中采用了多功能应用。然而，石墨烯复合材料的性能通常会受到高度无序的微观结构，纳米颗粒的聚集以及石墨烯和纳米颗粒之间松散连接的界面的困扰。这项对探索性研究（急切）项目的早期概念授予旨在阐明石墨烯/硅纳米复合材料在其电池应用中通过受控的激光处理在其电池应用中增强的电化学性能的基本机制。激光辅助合成研究将由试图预测观察到的行为的理论模型补充。与该项目相关的教育活动着重于中学生的动手外展活动，该活动通过普渡大学的工程女性在工程计划中进行了协调。这项研究的总体目的是通过激光处理来制造石墨烯/硅纳米复合材料，并通过原子化的建模和电化学测试来理解电化学行为。激光加工的石墨烯/硅纳米颗粒在机械稳定性，材料均匀性和在石墨烯/纳米颗粒接口处的接触性低显示。为了发展对激光处理和由此产生的属性的基本了解，研究计划有两个主要目标。第一个目标是通过实验和建模研究激光处理的纳米复合材料的界面工程。第二个目标是通过性能测试来了解石墨烯/硅纳米复合材料的电化学行为，例如充电/放电周期稳定性和速率性能。该研究将确定石墨烯/硅纳米复合材料增强电化学性能的最佳加工条件。从这项工作中获得的知识将有助于制造基于石墨烯的纳米复合材料，并有助于能源储存材料的开发。