Surface pseudocapacitance of mesoporous Mo3N2 nanowire anode toward reversible high-rate sodium-ion storage

被引：33

作者：

Jiang, Yalong ^{[1
]}

Dong, Jun ^{[1
]}

Tan, Shuangshuang ^{[1
]}

Wei, Qiulong ^{[2
]}

Xiong, Fangyu ^{[1
]}

Yang, Wei ^{[1
]}

Shen, Yuanhao ^{[1
]}

Zhang, Qingxun ^{[1
]}

Liu, Zi'ang ^{[1
]}

An, Qinyou ^{[1
]}

Mai, Liqiang ^{[1
,3
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

[2] Xiamen Univ, Dept Mat Sci & Engn, Coll Mat, Fujian Key Lab Mat Genome, Xiamen 361005, Fujian, Peoples R China

[3] Foshan Xianhu Lab, Adv Energy Sci & Technol Guangdong Lab, Foshan 528200, Guangdong, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2021年 / 55卷

基金：

中国国家自然科学基金;

关键词：

Surface pseudocapacitance; Sodium-ion storage; Nitrogen vacancy; Molybdenum nitride; High-rate; NEGATIVE ELECTRODE; EXCHANGE REACTION; VANADIUM NITRIDE; CHARGE STORAGE; METAL-OXIDE; PERFORMANCE; NANOSHEETS; BATTERIES; INSERTION;

D O I：

10.1016/j.jechem.2020.07.011

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Sodium-ion storage devices are highly desirable for large-scale energy storage applications owing to the wide availability of sodium resources and low cost. Transition metal nitrides (TMNs) are promising anode materials for sodium-ion storage, while their detailed reaction mechanism remains unexplored. Herein, we synthesize the mesoporous Mo3N2 nanowires (Meso-Mo3N2-NWs). The sodium-ion storage mechanism of Mo3N2 is systematically investigated through in-situ XRD, ex-situ experimental characterizations and detailed kinetics analysis. Briefly, the Mo3N2 undergoes a surface pseudocapacitive redox charge storage process. Benefiting from the rapid surface redox reaction, the Meso-Mo3N2-NWs anode delivers high specific capacity (282 mAh g(-1) at 0.1 A g(-1)), excellent rate capability (87 mAh g(-1) at 16 A g(-1)) and long cycling stability (a capacity retention of 78.6% after 800 cycles at 1 A g(-1)). The present work highlights that the surface pseudocapacitive sodium-ion storage mechanism enables to overcome the sluggish sodium-ion diffusion process, which opens a new direction to design and synthesize high-rate sodiumion storage materials. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

引用

页码：295 / 303

页数：9

共 53 条

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