三维石墨烯复合电极材料设计制备及柔性储能器件构筑

兼具高比能量、高比功率的柔性电化学储能器件已成为制约柔性电子器件发展的瓶颈。基于前期取得的高比表面积、高导电率以及高力学性能的柔性三维石墨烯材料以及器件性能等原创成果基础上，围绕电极材料、器件新原理等关键科学问题，本项目拟针对当前柔性储能器件能量密度较低、功率密度较低、柔性较差的难题，重点研究：（1）发展可控生长高碳sp2杂化三维石墨烯材料的制备技术，探讨石墨烯生长机理基本科学问题；（2）开展纳米限域结构、共价键连接三维石墨烯材料结构调控、杂质掺杂及性能优化研究；（3）构建高性能石墨烯基柔性复合电极材料，优化电化学性能；（4）设计制备柔性储能器件新结构体系，发展关键制备新技术，实现器件能量密度≥200 Wh/kg、循环≥1000周，器件容量保持率≥80%，器件保持良好柔韧性，弯曲1000次，器件容量保持率≥80%。通过项目实施，力争在关键新材料、关键技术指标、器件新技术等方面取得新突破。

Flexible electrochemical energy storage devices with high energy density and high power density have become the bottleneck restricting the development of flexible electronic devices. Based on the early original research results, such as the High specific surface area, high electrical conductivity and high mechanical properties of flexible three-dimensional graphene materials, the significant improvement of the device performance, etc., focusing on the key scientific problems of electrode materials and new device principle, etc. To solve the problem of of low energy density, low power density and poor flexibility of current flexible energy storage devices, this project mainly studies as follows: (1) Developing the preparation technology of three-dimensional graphene materials with controllable growth of high purity carbon sp2 hybrids, and explore the basic scientific problems in the growth mechanism of graphene; (2) Studying the tructural regulation, impurity doping and performance optimization of the nano-confined structures and covalently bond three-dimensional graphene materials; (3) Constructing high performance graphene-based flexible composite electrode materials to optimize electrochemical performance; (4) Studying new structure design of flexible energy storage device, and developing key fabrication technology to carry out the energy density of the energy storage devices of ≥200 Wh/kg, the capacity retention rate of ≥80% after 1000 cycles. The energy storage devices also maintain good flexibility, and the capacity retention rate of the energy storage devices reach ≥80% after 1000 time bending. Quite conceivably, our research will promote the breakthrough of new key material, key technical indicator and new energy storage technology, etc.