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Reaction-induced heat evolution and interface stabilization from bifunctional chlorine-rich anode for sulfide solid-state batteries
硫化物全固態電池中雙功能富氯負極的反應誘導產熱與界面穩定機制


Bereket Woldegbreal Taklu, Pei Hsing Chia, Chang Lin Liu, Yosef Nikodimos, Gashahun Gobena Serbessa, Lammi Terefe Kitaba, Kassie Nigus Shitaw, Tsung-I Yeh, Liang-Yu Lin, Jia-Hao Chang , Siyanand Kumar Chaudhary , Wei-Nien Su , Bing Joe Hwang
https://doi.org/10.1016/j.ensm.2025.104552
SEED Member: Wei-Nien Su , Bing Joe Hwang

 

Explicit illustration of LNbO-NCM811 ∣ LPSCl∣ x-Li (x = b or SnCl) full cell on the interphase evolution and dendrite growth over cycling.

 

Major Contributions
 

1.Introduced a solvent- and binder-free chlorine-rich artificial protective layer that forms an in-situ LiCl–Sn composite interlayer, effectively suppressing electrolyte decomposition and lithium dendrite growth. 

2.Demonstrated that Sn acts as a nucleation seed, modulating lithium flux through Li–Sn alloy formation and enhancing lithium reversibility, as confirmed by CV and impedance analyses. 

3.Achieved superior electrochemical stability in Li|LPSCl and NMC811|LPSCl|Li full cells, with prolonged cycling performance and high capacity retention at both room and elevated temperatures (30 °C and 55 °C).



主要貢獻

1.無溶劑富氯保護層與原位複合界面:引入了一種無溶劑且無黏結劑(solvent- and binder-free)的富氯人工保護層。該層能透過反應誘導原位形成 LiCl-Sn 複合中間層,有效抑制硫化物電解質的分解以及鋰枝晶(lithium dendrite)的生長。

2.錫 (Sn) 的成核與通量調控機制:透過循環伏安法(CV)與阻抗分析證實,錫(Sn)在界面中充當成核種子(nucleation seed)。它藉由形成鋰錫(Li-Sn)合金來調控鋰離子通量(lithium flux),進而增強鋰金屬沉積/剝離的可逆性。

3.優異的電化學穩定性:該策略在 Li|LPSCl 對稱電池與 NMC811|LPSCl|Li 全電池中均實現了卓越的電化學穩定性。無論是在室溫(30°C)還是高溫(55°C)條件下,電池皆展現了長循環壽命與高容量保持率。