Lithiation dynamics in vertically aligned 1T-PtSe2 and its application in dendrite-free lithium metal batteries DOI
Tingting Xu,

Lijuan Hou,

Zhiwen Zhou

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(20)

Published: May 19, 2025

Lithium metal anodes are highly promising for next-generation high-energy-density batteries due to their ultrahigh theoretical capacity and low electrochemical potential. However, practical application is hindered by issues such as lithium dendrite growth poor cyclability. Herein, a vertically aligned 1T-PtSe2 film on carbon cloth (PtSe2-CC) designed promote uniform Li plating via an in situ-formed Li2Pt/Li2Se interphase. Indeed, situ transmission electron microscopy studies ab initio molecular dynamics simulations elucidate the reaction mechanism between PtSe2 nanostructures metal, revealing formation of Li2Pt Li2Se phases that serve effective nucleation sites lithium. These facilitate homogeneous Li+ flux, thereby significantly enhancing performance. The PtSe2-CC electrode achieves ultralow overpotential (11.0 mV at 5 mA cm−2), stable cycling lifetime (>400 h cm−2, mAh high Coulombic efficiency (99.7% over 200 cycles), offering strategy dendrite-free batteries.

Language: Английский

Sodiophilic Ag-diamane-Modulated Polypropylene Separators for High-Performance Sodium Metal Anodes DOI Creative Commons

Gang Zhi,

Z.Q. Hu, Zhuangfei Zhang

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(10), P. 2092 - 2092

Published: May 8, 2025

Sodium metal is a promising anode material for sodium batteries (SMBs) due to its high theoretical specific capacity and low electrochemical potential. However, practical implementation severely limited by dendrite formation, which causes short circuits safety issues. Here, we introduce separator modification strategy using Ag nanoparticles decorated with two-dimensional diamane on commercial polypropylene (PP) substrate (Ag-diamane/PP) enhance the performance of anodes (SMAs). The synergistic effect between sodiophilic network not only accelerates Na⁺ transport through modified but also reduces interfacial resistance. This dendrite-suppression was systematically validated in situ optical microscopy ex scanning electron microscopy. Symmetric Na||Na cells incorporating Ag-diamane/PP exhibit exceptional cycling stability, maintaining more than 3800 h operation at 2 mA cm−2 1 mAh cm−2. Furthermore, full-cell configuration Na3V2(PO4)3@C cathode, separator, Na delivers reversible 94.35 g−1 stable 270 cycles. work highlights as solution advancing dendrite-free SMBs long-term stability energy density.

Language: Английский

Citations

0
Lithiation dynamics in vertically aligned 1T-PtSe2 and its application in dendrite-free lithium metal batteries DOI
Tingting Xu,

Lijuan Hou,

Zhiwen Zhou

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(20)

Published: May 19, 2025

Lithium metal anodes are highly promising for next-generation high-energy-density batteries due to their ultrahigh theoretical capacity and low electrochemical potential. However, practical application is hindered by issues such as lithium dendrite growth poor cyclability. Herein, a vertically aligned 1T-PtSe2 film on carbon cloth (PtSe2-CC) designed promote uniform Li plating via an in situ-formed Li2Pt/Li2Se interphase. Indeed, situ transmission electron microscopy studies ab initio molecular dynamics simulations elucidate the reaction mechanism between PtSe2 nanostructures metal, revealing formation of Li2Pt Li2Se phases that serve effective nucleation sites lithium. These facilitate homogeneous Li+ flux, thereby significantly enhancing performance. The PtSe2-CC electrode achieves ultralow overpotential (11.0 mV at 5 mA cm−2), stable cycling lifetime (>400 h cm−2, mAh high Coulombic efficiency (99.7% over 200 cycles), offering strategy dendrite-free batteries.

Language: Английский

Citations

0