Lee Yujin, Kim Seoa, Lee Jeong Han, Roh Kwang Chul, Lim Eunho, Lee Jinwoo
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science Technology (KAIST) Daejeon 34141 Republic of Korea
Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology (KICET) Jinju Gyeongnam 52851 Republic of Korea.
RSC Adv. 2019 Nov 20;9(65):37882-37888. doi: 10.1039/c9ra07157a. eCollection 2019 Nov 19.
A Li-ion hybrid supercapacitor (Li-HSCs), an integrated system of a Li-ion battery and a supercapacitor, is an important energy-storage device because of its outstanding energy and power as well as long-term cycle life. In this work, we propose an attractive material (a mesoporous anatase titanium dioxide/carbon hybrid material, m-TiO-C) as a rapid and stable Li storage anode material for Li-HSCs. m-TiO-C exhibits high specific capacity (∼198 mA h g at 0.05 A g) and promising rate performance (∼90 mA h g at 5 A g) with stable cyclability, resulting from the well-designed porous structure with nanocrystalline anatase TiO and conductive carbon. Thereby, it is demonstrated that a Li-HSC system using a m-TiO-C anode provides high energy and power (∼63 W h kg, and ∼4044 W kg).
锂离子混合超级电容器（Li-HSCs）是锂离子电池和超级电容器的集成系统，因其出色的能量和功率以及长期循环寿命而成为一种重要的储能装置。在这项工作中，我们提出了一种有吸引力的材料（介孔锐钛矿二氧化钛/碳混合材料，m-TiO-C）作为Li-HSCs快速稳定的锂存储负极材料。m-TiO-C表现出高比容量（在0.05 A g时约为198 mA h g）和良好的倍率性能（在5 A g时约为90 mA h g），且循环稳定性良好，这得益于精心设计的具有纳米晶锐钛矿TiO和导电碳的多孔结构。由此证明，使用m-TiO-C负极的Li-HSC系统具有高能量和功率（约63 W h kg和约4044 W kg）。
