Insight into the Li-storage property of surface-modified Ti2Nb10O29 anode material for high-rate application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F23%3A63569738" target="_blank" >RIV/70883521:28610/23:63569738 - isvavai.cz</a>

Result on the web

<a href="https://pubs.acs.org/doi/10.1021/acsami.3c14174" target="_blank" >https://pubs.acs.org/doi/10.1021/acsami.3c14174</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsami.3c14174" target="_blank" >10.1021/acsami.3c14174</a>

Result language

angličtina

Original language name

Insight into the Li-storage property of surface-modified Ti2Nb10O29 anode material for high-rate application

Original language description

Ti-based anode materials are considered to be an alternative to graphite anodes to accomplish high-rate application requirements. Ti2Nb10O29 (TNO15) has attracted much attention due to its high lithium storage capacity through the utilization of multiple redox couples and a suitable operating voltage window of 1.0 to 2.0 V vs Li/Li+. However, poor intrinsic electronic conductivity has limited the futuristic applicability of this material to the battery anode. In this work, we report the modification of TNO15 by introducing oxygen vacancies and using few-layered carbon and copper coatings on the surface to improve its Li+ storage property. With the support of the galvanostatic intermittent titration technique (GITT), we found that the diffusion coefficient of carbon/copper coated TNO15 is 2 orders of magnitude higher than that of the uncoated sample. Here, highly conductive copper metal on the surface of the carbon-coated oxygen-vacancy-incorporated TNO15 increases the overall electronic and ionic conductivity. The prepared TNO15-800-C-Cu-700 half-cell shows a significant rate capability of 92% when there is a 10-fold increase in the current density. In addition, the interconnected TNO15 nanoparticles create a porous microsphere structure, which enables better Li-ion transportation during charge/discharge process, and experiences an enhancement after the carbon and copper coating on the surface of the primary TNO15 nanocrystallites.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ACS Applied Materials and Interfaces

ISSN

1944-8244

e-ISSN

—

Volume of the periodical

15

Issue of the periodical within the volume

47

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

54568-54581

UT code for WoS article

001111118700001

EID of the result in the Scopus database

2-s2.0-85178499713