将电池型过渡金属化合物引入超级电容器，构筑高能量混合型储能器件是当前的研究热点，但其较低的电子传输及离子扩散速率严重限制了材料的倍率性能，制约器件的功率密度。本项目拟通过有效的结构设计开发利用电池型材料的非本征赝电容特性，研究如何改善过渡金属化合物电荷传输动力学的科学问题。具体将选取典型的电池型材料，设计构筑基于二维过渡金属化合物的双活性组分复合体系，探索简单高效的复合方法；同时调控两相复合尺度、复合方式及导电性能，结合电化学反应中界面微观结构表征及电化学分析，研究复合体系的界面电荷存储行为；结合第一性原理模拟计算复合体系的表/界面结构对电荷输运、电子结构等的影响机制，研究界面限域电荷传输动力学，从分子及原子尺度上揭示电池型材料中赝电容的产生机制。在此基础上构筑基于二维过渡金属化合物的高功率混合型储能器件。本研究将对高倍率电极材料的开发及下一代高性能混合型储能器件的研制具有重要的科学意义。

Nowadays, battery-type transition metal compounds (TMCs) are introduced to hybrid energy storage devices to improve the energy density, however their low electron transfer rate and poor ion transportation, seriously limits their rate performance and damage the power density of hybrid energy storage devices. This research will focus on the design and construction of two-dimensional TMCs (2DTMCs) based double-active-component composite system (2DTMCs-DCS), taking advantage of the extrinsic pseudocapacitance characteristic of battery-type TMCs, and reveal the scientific issues related to charge transfer dynamics of the composite system, Specifically, typical battery-type TMCs will be selected and efficient synthetic approaches about 2DTMCs-DCS will be investigated. The interface charge storage behavior will be studied through adjusting the compositing scale and compositing ways, with systematic characterization of interface structure and electrochemical performance. In addition, the influence mechanism of surface/ interface structure on charge transport, electronic structure etc., will be explored with the investigation of first-principles calculation to study the interfaced confined charge transfer kinetics of composite system, and reveal the mechanism of extrinsic pseudocapacitance from the molecular and atomic scales. Eventually, a high-power hybrid energy storage device based on 2DTMCs-DCS will be designed and constructed. This study has great scientific significance for the development of high rate electrode materials and construction of next generation hybrid energy storage devices with high performance.