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Polyvinylpyrrolidone assisted transformation of Cu-MOF into N/P-co-doped Octahedron carbon encapsulated Cu 3 P nanoparticles as high performance anode for lithium ion batteries.

Authors :
Feng Q
Li T
Miao Y
Sui Y
Xiao B
Sun Z
Qi J
Wei F
Meng Q
Ren Y
Xue X
Source :
Journal of colloid and interface science [J Colloid Interface Sci] 2022 Feb 15; Vol. 608 (Pt 1), pp. 227-238. Date of Electronic Publication: 2021 Sep 27.
Publication Year :
2022

Abstract

The large volume expansion and poor electrical conductivity of copper phosphide (Cu <subscript>3</subscript> P) during the cycle limit their further application as anode of lithium-ion batteries. Therefore, polyvinylpyrrolidone (PVP) modified Cu <subscript>3</subscript> (BTC) <subscript>2</subscript> -derived (BTC = 1, 3, 5-Benzentricarboxylic acid) in-situ N/P-co-doped Octahedron carbon encapsulated Cu <subscript>3</subscript> P nanoparticles (Cu <subscript>3</subscript> P@NPC) are successfully prepared through a two-step process of carbonization and phosphating. The N/P-co-doped Octahedron carbon matrix improves the conductivity of Cu <subscript>3</subscript> P and moderates the volume expansion during the lithiation/delithiation process. Meanwhile, the interaction between the Cu <subscript>3</subscript> P and the doped carbon matrix is methodically explored by using density functional theory (DFT). Through the analysis of the partial charge density, the density of states and the Bader charge, and the calculation results verify the correctness of the experimental observation results, that is, Cu <subscript>3</subscript> P@NPC has good electrochemical performance. The results show that Cu <subscript>3</subscript> P@NPC, as the anode of Lithium-ion batteries, has excellent electrochemical performance: it exhibits satisfactory rate performance (251.9 mAh g <superscript>-1</superscript> at 5.0 A g <superscript>-1</superscript> ) and excellent cycle performance (336.4 mAh g <superscript>-1</superscript> at 1 A g <superscript>-1</superscript> over 1000 cycles). This article provides an effective strategy for the encapsulation of metal phosphide nanoparticles in a doped carbon matrix.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2021 Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1095-7103
Volume :
608
Issue :
Pt 1
Database :
MEDLINE
Journal :
Journal of colloid and interface science
Publication Type :
Academic Journal
Accession number :
34626970
Full Text :
https://doi.org/10.1016/j.jcis.2021.09.147