2D-layered Sn/Ge anodes for lithium -ion batteries with high capacity and ultra -fast Li ion diffusivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F20%3A10245153" target="_blank" >RIV/61989100:27740/20:10245153 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2095495619309179?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2095495619309179?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jechem.2019.11.025" target="_blank" >10.1016/j.jechem.2019.11.025</a>

Result language

angličtina

Original language name

2D-layered Sn/Ge anodes for lithium -ion batteries with high capacity and ultra -fast Li ion diffusivity

Original language description

In summary, we investigated the suitability of stanene/germanene as anode material for LIB. A series of 2D- layered Li-Sn/Ge intermetallic compounds were predicted by genetic structure evaluation algorithms and the charge-discharge process were studied based on these phases. And it is also found that 2D-layered stanene and germanene own higher lithium capacity than 3D tin and germanium. By further simulating Li ions transferred regularity and diffusion rate, the excellent Li ions diffusion property expressed that the ultra-fast Li diffusivity could be achieved, especially for 2D Li-Sn system. The diffu- sion barriers were found to be related to crystal, rhombohedral phases show harder Li ions diffusion with higher energy barriers than orthorhombic and monoclinic crystal systems. As anode materials, 2D stanene and germanene provide the better com- prehensive performance obviously than bulk tin and germanium. For stanene anode, the highest content of Li reaches to 0.857 in charge-discharge process (germanene anode reaches to 0.833), both layered tin and germanium show higher lithium capacity than bulk. and the fast diffusion pathway could reduce energy barrier to ~ 0.03 eV. In total, it is suitable for stanene/germanene as anodes of LIB with the outstanding properties, especially stanene. Our results not only reveal the phase transition regularity of stanene/germanene as anode of LIB during charge-discharge process, but also offer a theory foundation for the application of new 2D-layered materials in LIB.

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

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

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)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of Energy Chemistry

ISSN

2095-4956

e-ISSN

—

Volume of the periodical

47

Issue of the periodical within the volume

August

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

160-165

UT code for WoS article

000540735400007

EID of the result in the Scopus database

2-s2.0-85076915101