Ultra-fast NH4+ Storage: Strong H Bonding between NH4+ and Bi-layered V2O5

被引：292

作者：

Dong, Shengyang ^{[1
,2
]}

Shin, Woochul ^{[2
]}

Jiang, Heng ^{[2
]}

Wu, Xianyong ^{[2
]}

Li, Zhifei ^{[2
]}

Holoubek, John ^{[2
]}

Stickle, William F. ^{[5
]}

Key, Baris ^{[4
]}

Liu, Cong ^{[4
]}

Lu, Jun ^{[4
]}

Greaney, P. Alex. ^{[3
]}

Zhang, Xiaogang ^{[1
]}

Ji, Xiulei ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Jiangsu Key Lab Electrochem Energy Storage Techno, Nanjing 210016, Jiangsu, Peoples R China

[2] Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA

[3] Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA

[4] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

[5] Hewlett Packard Corp, 1000 NE Circle Blvd, Corvallis, OR 97330 USA

来源：

CHEM | 2019年 / 5卷 / 06期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

ELECTROCHEMICAL ENERGY-STORAGE; INITIO MOLECULAR-DYNAMICS; AB-INITIO; OXYGEN VACANCIES; TIO2; ANATASE; INTERCALATION; VANADIUM; TRANSITION; BEHAVIOR; OXIDE;

D O I：

10.1016/j.chempr.2019.03.009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

It is accepted that the performance of batteries is dominated by the properties of their electrode materials. However, this maxim is built from the practice that the majority of research efforts have been directed toward batteries that use metal ions as the charge carriers. Herein, we show that the use of NH4+ results in battery performance governed by the chemical nature of the ion-electrode interaction. Specifically, we show that H bonding between NH4+ and a bilayered V2O5 electrode is coupled with prominent pseudocapacitive behavior. The importance of the H bonding is demonstrated by comparing the storage of NH4+ in V2O5 with storage of K+. In addition to having a higher capacity and longer life of 30,000 cycles, NH4+ storage is overwhelmingly more pseudocapacitive than the K storage. Furthermore, first-principle calculations reveal an intriguing ion rotation-diffusion mechanism of NH4+ inside the V2O5 structure, akin to swinging on monkey bars.

引用

页码：1537 / 1551

页数：15

共 61 条

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