Tunable pseudocapacitive contribution by dimension control in nanocrystalline-constructed (Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)O solid solutions to achieve superior lithium-storage properties.

ABSTRACT: Ultrafine crystalline materials have been extensively investigated as high-rate lithium-storage materials due to their shortened charge-transport length and high surface area. The pseudocapacitive effect plays a considerable role in electrochemical lithium storage when the electrochemically active materials approach nanoscale dimensions, but this has received limited attention. Herein, a series of (Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)O electrodes with different particle sizes were prepared and tested. The ultrafine (Mg_0.2Co_0.2Ni_0.2Cu_0.2Zn_0.2)O nanofilm (3-5 nm) anodes show a remarkable rate capability, delivering high specific charge and discharge capacities of 829, 698, 602, 498 and 408 mA

SUBMITTER: Chen H 

PROVIDER: S-EPMC9071823 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature