English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Correlating the Peukert's constant with phase composition of electrode materials in fast lithiation processes

Zhang, Y., Tang, Y., Deng, J., Leow, W. R., Xia, H., Zhu, Z., et al. (2019). Correlating the Peukert's constant with phase composition of electrode materials in fast lithiation processes. ACS Materials Letters, 1(5), 519-525. doi:10.1021/acsmaterialslett.9b00320.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-D5E4-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-E4EF-D
Genre: Journal Article

Files

show Files
hide Files
:
Article.pdf (Publisher version), 5MB
 
File Permalink:
-
Name:
Article.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute of Colloids and Interfaces, MTKG; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Zhang, Yanyan, Author
Tang, Yuxin, Author
Deng, Jiyang, Author
Leow, Wan Ru, Author
Xia, Huarong, Author
Zhu, Zhiqiang, Author
Lv, Zhisheng, Author
Wei, Jiaqi, Author
Li, Wenlong, Author
Persson, Clas, Author
Malyi, Oleksandr I., Author
Antonietti, Markus1, Author              
Chen, Xiaodong, Author
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

Content

show
hide
Free keywords: Oxides; Composites; Lithiation; Electrodes; Minerals
 Abstract: The electrochemical performance of energy storage devices decreasing with the increase of charging/discharging rates is described as the Peukert's effect. To minimize this effect, the reduction of the Peukert's constant towards the ideal value of 1.0 is needed. Herein, for the first time, we reveal a correlation between the Peukert's constant and the phase composition of electrode materials in lithium-ion batteries (LIBs). As a proof-of-concept, a parabola-like correlation is observed in the anatase/TiO2(B) electrode with a significant reduction in the Peukert's constant from 2.15 to 1.20, when the content of anatase phase increases from 0% to 22%. This corresponds to a capacity enhancement of about three times from 42.2 to 131.5 mAh g-1 at a current density of 12.0 A g-1. The boosted charge-transfer kinetics in the composite electrode, relative to that of the single component electrode, is the cause for the reduction in the Peukert's constant. Theoretical calculations well support the cooperative effect of maximizing both electronic conductivity and Li-ion diffusivity in the composite electrode. Our present findings provide a new way for reducing the Peukert's constant in LIBs via manipulating the materials composition, which constitutes a generalized solution towards the improved rate-performance in electrochemical reactions.

Details

show
hide
Language(s): eng - English
 Dates: 2019-10-032019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/acsmaterialslett.9b00320
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: ACS Materials Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: American Chemical Society
Pages: - Volume / Issue: 1 (5) Sequence Number: - Start / End Page: 519 - 525 Identifier: ISSN: 2639-4979