Dean Yen

Plasticizer-Free Gradient-Crosslinked Polyurethane Electrolyte for Room-Temperature Solid-State Lithium Batteries

Nan Wang, Dean Yen, X Iang Zhang, Guang Yang et autres

Polymer-based solid-state electrolytes are promising for next-generation lithium metal batteries, yet their limited ionic conductivity and mechanical stability at ambient conditions remain key challenges. Herein, we report a novel gradient crosslinked polymer electrolyte (PU/PUA/PU) synthesized via a sequential in situ UV-curing process …

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Chemical and Structural Insights into Solid Electrolyte Interphase Evolution for Sodium Metal Electrodes

Aditya Singla, Varun R. Kankanallu, Dean Yen, Bairav S. Vishnugopi et autres

The solid electrolyte interphase (SEI) critically governs the reversibility of sodium metal batteries, through dynamically mediating ion transport and interfacial reactions. However, its kinetic evolution under operating conditions, and how it influences interfacial stability, remains poorly understood. Here, we reveal that the …

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Revealing key structures for reversible sulfur redox in amorphous polymeric sulfur

Nan Wang, Shen Wang, Yu Zheng, Dacheng Kuai et autres

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Synchronized Breathing in Anion-Derived Interphases

Sha Tan, Kangxuan Xia, Nan Wang, Dean Yen et autres

Anion-derived interphases are crucial for extending the cycle life of lithium metal batteries. While their benefits are often attributed to crystalline inorganic species like LiF and Li 2 O, the role of amorphous inorganic species and the interplay between the anode-electrolyte interphase …

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Kinetics of Electrodeposition and Dissolution in Sodium Anodes: Interplay of Na Deposit and Its Solid-Electrolyte Interphase

Chang‐An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla et autres

Sodium (Na) anodes hold significant potential to meet the growing demand for high-energy-density electrochemical energy storage and an alternative to lithium metals. Achieving long-lasting stability at the metal-electrolyte interface is crucial for the development of emerging sodium metal-based electrochemical energy storage technologies. …

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Ternary Potassium‐Bismuth‐Telluride Intermetallic Support Promotes Electrochemical Stability in Potassium Metal Anodes

Rohit Raj, Yixian Wang, Dean Yen, Aditya Singla et autres

Abstract We employed accumulative roll bonding to fabricate self‐standing metallurgical composite of in situ formed alkaline potassium‐bismuth‐telluride intermetallic K 2 (Bi 2/6 Te 3/6 Vac 1/6 ) embedded in potassium metal. This newly discovered thermodynamically stable potassiophilic crystal, termed “KBT”, is fcc …

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Ternary Potassium‐Bismuth‐Telluride Intermetallic Support Promotes Electrochemical Stability in Potassium Metal Anodes

Rohit Raj, Yixian Wang, Dean Yen, Aditya Singla et autres

Abstract We employed accumulative roll bonding to fabricate self‐standing metallurgical composite of in situ formed alkaline potassium‐bismuth‐telluride intermetallic K 2 (Bi 2/6 Te 3/6 Vac 1/6 ) embedded in potassium metal. This newly discovered thermodynamically stable potassiophilic crystal, termed “KBT”, is fcc …

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Cover Picture: Interdependence of Support Wettability ‐ Electrodeposition Rate‐ Sodium Metal Anode and SEI Microstructure (Angew. Chem. Int. Ed. 8/2025)

Chang‐An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla et autres

Electrodeposition of sodium metal in an anode-free battery can be dendritic. The tree at the center of the cover image represents a single crystalline dendrite, branched and complex in its morphology, originating at the support and growing towards the cathode. Its multicolor …

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Titelbild: Interdependence of Support Wettability ‐ Electrodeposition Rate‐ Sodium Metal Anode and SEI Microstructure (Angew. Chem. 8/2025)

Chang‐An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla et autres

Electrodeposition of sodium metal in an anode-free battery can be dendritic. The tree at the center of the cover image represents a single crystalline dendrite, branched and complex in its morphology, originating at the support and growing towards the cathode. Its multicolor …

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Synergistic Anion and Solvent-Derived Interphases Enable Lithium-Ion Batteries under Extreme Conditions

Sha Tan, Oleg Borodin, Nan Wang, Dean Yen et autres

Lithium-ion batteries (LIBs) face increasingly stringent demands as their application expands into new areas, including extreme temperatures and fast charging. To meet these demands, the electrolyte should enable fast lithium-ion transport and form stable interphases on electrodes simultaneously. In practice, however, improving …

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Interdependence of Support Wettability ‐ Electrodeposition Rate‐ Sodium Metal Anode and SEI Microstructure

Chang‐An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla et autres

Abstract This study examines how current collector support chemistry (sodiophilic intermetallic Na2Te vs. sodiophobic baseline Cu) and electrodeposition rate affect microstructure of sodium metal and its solid electrolyte interphase (SEI). Capacity and current (6 mAh cm−2, 0.5–3 mA cm−2) representative of commercially …

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Interdependence of Support Wettability ‐ Electrodeposition Rate‐ Sodium Metal Anode and SEI Microstructure

Chang‐An Lo, Yixian Wang, Varun R. Kankanallu, Aditya Singla et autres

Abstract This study examines how current collector support chemistry (sodiophilic intermetallic Na 2 Te vs. sodiophobic baseline Cu) and electrodeposition rate affect microstructure of sodium metal and its solid electrolyte interphase (SEI). Capacity and current (6 mAh cm −2 , 0.5–3 mA …

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