查找使用阿拉丁产品的科研文献

Intrinsic voltage plateau of a Nb2CTx MXene cathode in an aqueous electrolyte induced by high-voltage scanning

Xinliang Li,Xinyao Ma,Yue Hou,Zhenhua Zhang,Yue Lu,Zhaodong Huang,Guojin Liang,Mian Li,Qi Yang,Jiale Ma,Na Li,Binbin Dong,Qing Huang,Furong Chen,Jun Fan,Chunyi Zhi

Although MXene has been widely used in many energy storage systems, the absence of a high intrinsic voltage plateau results in its poor discharging feature. Herein, we report a Nb 2 CTx MXene cathode with an apparent discharge voltage plateau for high-performance aqueous zinc ion batteries. Triggered by a repeated high-voltage scanning up to 2.4 V, the Nb 2 CTx cathode gradually displays a stable Zn 2+ storage dominated by a battery behavior. A high discharge voltage plateau of 1.55 V is presented, which is distinct from all reported MXene electrodes. Consequently, a record-level energy density among all aqueous MXenes electrodes of 146.7 Wh kg −1 with a 63% contribution from the plateau region is obtained, which is 292% that of the capacitive Nb 2 CTx electrode. The developed high-voltage scanning strategy is also effective for Ti 3 C 2 T x MXene to achieve a remarkable voltage plateau.