Novel in-situ encapsulation of tin phosphide particles in MXene conductive networks as anode materials of the durable sodium-ion battery

Journal article

Authors/Editors

CHUTIMA KONGVARHODOM

Strategic Research Themes

Innovative Materials, Manufacturing and Construction (Strategic Research Themes)

Publication Details

Author list: Wu C.-F.; Kubendhiran S.; Chung R.-J.; Kongvarhodom C.; Husain S.; Yougbaré S.; Chen H.-M.; Wu Y.-F.; Lin L.-Y.

Publisher: Elsevier

Publication year: 2024

Journal: Journal of Colloid and Interface Science (0021-9797)

Volume number: 675

Start page: 792

End page: 805

Number of pages: 14

ISSN: 0021-9797

eISSN: 1095-7103

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198269732&doi=10.1016%2fj.jcis.2024.07.070&partnerID=40&md5=5947f721b9fb09951bf30d762ed0e54f

Languages: English-Great Britain (EN-GB)

View on publisher site

Abstract

Sodium-ion battery (SIB) is one of potential alternatives to lithium-ion battery, because of abundant resources and lower price of sodium. High electrical conductivity and long-term durability of MXene are advantageous as the anode material of SIB, but low energy density restricts applications. Tin phosphide possesses high theoretical capacity, low redox potential, and large energy density, but volume expansion reduces its cycling stability. In this study, tin phosphide particles are in-situ encapsulated into MXene conductive networks (SnxPy/MXene) by hydrothermal and phosphorization processes as novel anode materials of SIB. MXene amounts and hydrothermal durations are investigated to evenly distribute SnxPy in MXene. After 100 cycles, SnxPy/MXene reaches high specific capacities of 438.8 and 314.1 mAh/g at 0.2 and 1.0 A/g, respectively. The capacity retentions of 6.0% and 73.6% at 0.2 A/g are respectively obtained by SnxPy and SnxPy/MXene. The better specific capacity and cycling stability of SnxPy/MXene are attributed to less volume expansion of SnxPy during charge/discharge processes and relieved self-stacking of MXene by encapsulating SnxPy particles between MXene layers. Electrochemical impedance spectroscopy and Galvanostatic intermittent titration technique are also applied to analyze the charge storage mechanism in SIB. Higher sodium ion diffusion coefficient and smaller charge-transfer resistance are obtained by SnxPy/MXene. © 2024 Elsevier Inc.

Keywords

Galvanostatic intermittent titration technique, Self-stacking, Tin phosphide