Localized Electrons Enhanced Ion Transport for Ultrafast Electrochemical Energy Storage

被引：51

作者：

Chen, Jiewei ^{[1
]}

Luo, Bi ^{[1
]}

Chen, Qiushui ^{[2
]}

Li, Fei ^{[3
,4
]}

Guo, Yanjiao ^{[1
]}

Wu, Tom ^{[5
]}

Peng, Peng ^{[1
]}

Qin, Xian ^{[2
]}

Wu, Gaoxiang ^{[1
]}

Cui, Mengqi ^{[1
]}

Liu, Lehao ^{[1
]}

Chu, Lihua ^{[1
]}

Jiang, Bing ^{[1
]}

Li, Yingfeng ^{[1
]}

Gong, Xueqing ^{[3
,4
]}

Chai, Yang ^{[6
]}

Yang, Yongping ^{[1
]}

Chen, Yonghua ^{[7
,8
]}

Huang, Wei ^{[7
,8
,9
]}

Liu, Xiaogang ^{[2
]}

Li, Meicheng ^{[1
]}

机构：

[1] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[3] East China Univ Sci & Technol, Ctr Computat Chem, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

[4] East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

[5] Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[6] Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Kowloon, Hong Kong 999077, Peoples R China

[7] Nanjing Tech Univ, Key Lab Flexible Elect KLOFE, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 210028, Peoples R China

[8] Nanjing Tech Univ, IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 210028, Peoples R China

[9] NPU, SIFE, Xian 710072, Peoples R China

来源：

ADVANCED MATERIALS | 2020年 / 32卷 / 14期

关键词：

ion transport; electrochemical energy storage; high loading mass; lithium-ion batteries; sodium-ion batteries; LITHIUM-ION; BLACK TIO2; ANODE MATERIAL; CAPACITY; ANATASE;

D O I：

10.1002/adma.201905578

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The rate-determining process for electrochemical energy storage is largely determined by ion transport occurring in the electrode materials. Apart from decreasing the distance of ion diffusion, the enhancement of ionic mobility is crucial for ion transport. Here, a localized electron enhanced ion transport mechanism to promote ion mobility for ultrafast energy storage is proposed. Theoretical calculations and analysis reveal that highly localized electrons can be induced by intrinsic defects, and the migration barrier of ions can be obviously reduced. Consistently, experiment results reveal that this mechanism leads to an enhancement of Li/Na ion diffusivity by two orders of magnitude. At high mass loading of 10 mg cm(-2) and high rate of 10C, a reversible energy storage capacity up to 190 mAh g(-1) is achieved, which is ten times greater than achievable by commercial crystals with comparable dimensions.

引用

页数：8

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