假电容
材料科学
假电容器
电化学
氯化物
电极
离子
超级电容器
储能
化学工程
无机化学
物理化学
冶金
有机化学
化学
热力学
物理
工程类
功率(物理)
作者
Satoshi Kajiyama,Lucie Szabová,Hiroki Iinuma,Akira Sugahara,Kazuma Gotoh,Keitaro Sodeyama,Yoshitaka Tateyama,Masashi Okubo,Atsuo Yamada
标识
DOI:10.1002/aenm.201601873
摘要
Pseudocapacitance is a key charge storage mechanism to advanced electrochemical energy storage devices distinguished by the simultaneous achievement of high capacitance and a high charge/discharge rate by using surface redox chemistries. MXene, a family of layered compounds, is a pseudocapacitor‐like electrode material which exhibits charge storage through exceptionally fast ion accessibility to redox sites. Here, the authors demonstrate steric chloride termination in MXene Ti 2 C T x ( T x : surface termination groups) to open the interlayer space between the individual 2D Ti 2 C T x units. The open interlayer space significantly enhances Li‐ion accessibility, leading to high gravimetric and volumetric capacitances (300 F g −1 and 130 F cm −3 ) with less diffusion limitation. A Li‐ion hybrid capacitor consisting of the Ti 2 C T x negative electrode and the LiNi 1/3 Co 1/3 Mn 1/3 O 2 positive electrode displays an unprecedented specific energy density of 160 W h kg −1 at 220 W kg −1 based on the total weight of positive and negative active materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI