Investigation of Potassium Storage in Layered P3-Type K0.5MnO2 Cathode

被引：313

作者：

Kim, Haegyeom ^{[1
]}

Seo, Dong-Hwa ^{[2
]}

Kim, Jae Chul ^{[1
]}

Bo, Shou-Hang ^{[1
,3
]}

Liu, Lei ^{[4
]}

Shi, Tan ^{[2
]}

Ceder, Gerbrand ^{[1
,2
]}

机构：

[1] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[3] Shanghai Jiao Tong Univ, Univ Michigan Shanghai Jiao Tong Univ Joint Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[4] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

ADVANCED MATERIALS | 2017年 / 29卷 / 37期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

batteries; energy storage; layered compounds; potassium; SODIUM-ION BATTERIES; STRUCTURAL-CHARACTERIZATION; LITHIUM INTERCALATION; ANODE MATERIAL; AB-INITIO; ELECTRODES; PERFORMANCE; TRANSITION; GRAPHITE;

D O I：

10.1002/adma.201702480

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Novel and low-cost batteries are of considerable interest for application in large-scale energy storage systems, for which the cost per cycle becomes critical. Here, this study proposes K0.5MnO2 as a potential cathode material for K-ion batteries as an alternative to Li technology. K0.5MnO2 has a P3-type layered structure and delivers a reversible specific capacity of approximate to 100 mAh g(-1) with good capacity retention. In situ X-ray diffraction analysis reveals that the material undergoes a reversible phase transition upon K extraction and insertion. In addition, first-principles calculations indicate that this phase transition is driven by the relative phase stability of different oxygen stackings with respect to the K content.

引用

页数：6

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