In Situ Constructed Co/NaCl Mixed Ion/Electron‐Conducting Interphase Enabling Dendrite‐Free Sodium Metal Anodes DOI
Yan Wang, Xiaoyang Zheng, Wenya Wang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Июнь 2, 2025

Abstract The practical deployment of sodium metal anodes (SMAs) is hindered by dendrite growth, unstable solid‐electrolyte interphase, and severe volume fluctuations. Herein, an in situ constructed mixed ion/electron‐conducting (MIEC) artificial interphase comprising Co nanoparticles NaCl nanocrystals proposed to address these challenges. This layer forms spontaneously via a displacement reaction between CoCl 2 Na, yielding dual‐phase structure where ionic‐conducting domains are interspersed with electron‐conducting nanocrystals. phase ensures ultralow Na⁺ diffusion barriers (0.058 eV), while the network enhances sodiophilicity (−5.98 eV for Na adsorption energy) mechanical robustness (5.02 GPa Young's modulus), enabling uniform deposition suppression. Consequently, Co/NaCl/Na||Cu half‐cell exhibits excellent cyclability, achieving average Coulombic efficiency 99.89% over 1000 cycles at 5 mA cm −2 h . In symmetric cells, Co/NaCl/Na electrode maintains stable operation 4 under high depth discharge 75%. Full cell coupled 3 V (PO ) retains 82 g −1 after 8 C. work demonstrates scalable strategy stabilize SMAs through robust MIEC paving way next‐generation batteries.

Язык: Английский

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

Gang Zhi,

Z.Q. Hu, Zhuangfei Zhang

и другие.

Molecules, Год журнала: 2025, Номер 30(10), С. 2092 - 2092

Опубликована: Май 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.

Язык: Английский

Процитировано

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

Lijuan Hou,

Zhiwen Zhou

и другие.

Applied Physics Letters, Год журнала: 2025, Номер 126(20)

Опубликована: Май 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.

Язык: Английский

Процитировано

0
Diamane Facilitated the Stability of Sodium Metal Anodes DOI

Zhenxin Huang,

Zhuangfei Zhang,

Nan Shen

и другие.

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Sodium metal anodes hold great promise for next-generation batteries due to their high theoretical capacity and low working potential, yet notorious Na dendrites impose tremendous safety concerns. Here, diamane (two-dimensional diamond) nanoflakes modulating the polypropylene (PP) separator are implemented address this issue. The physically exfoliated from commercially available diamond exhibits its superiority in suppressing formation by stable sp3 carbon surface. Using PP/diamane separator, demonstrate exceptional stability over 1000 h at an ultrahigh current density of 20 mA cm-2. Notably, also ensures cycling elevated temperature 60 °C. Encouragingly, full cell Na||PP/diamane||Na3V2(PO4)3@C delivers a 81.6 mAh g-1 with minimal decay 0.003% per cycle after cycles. These results provide promising strategy realizing via incorporation nanoflakes.

Язык: Английский

Процитировано

0
In Situ Constructed Co/NaCl Mixed Ion/Electron‐Conducting Interphase Enabling Dendrite‐Free Sodium Metal Anodes DOI
Yan Wang, Xiaoyang Zheng, Wenya Wang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Июнь 2, 2025

Abstract The practical deployment of sodium metal anodes (SMAs) is hindered by dendrite growth, unstable solid‐electrolyte interphase, and severe volume fluctuations. Herein, an in situ constructed mixed ion/electron‐conducting (MIEC) artificial interphase comprising Co nanoparticles NaCl nanocrystals proposed to address these challenges. This layer forms spontaneously via a displacement reaction between CoCl 2 Na, yielding dual‐phase structure where ionic‐conducting domains are interspersed with electron‐conducting nanocrystals. phase ensures ultralow Na⁺ diffusion barriers (0.058 eV), while the network enhances sodiophilicity (−5.98 eV for Na adsorption energy) mechanical robustness (5.02 GPa Young's modulus), enabling uniform deposition suppression. Consequently, Co/NaCl/Na||Cu half‐cell exhibits excellent cyclability, achieving average Coulombic efficiency 99.89% over 1000 cycles at 5 mA cm −2 h . In symmetric cells, Co/NaCl/Na electrode maintains stable operation 4 under high depth discharge 75%. Full cell coupled 3 V (PO ) retains 82 g −1 after 8 C. work demonstrates scalable strategy stabilize SMAs through robust MIEC paving way next‐generation batteries.

Язык: Английский

Процитировано

0