Changhao Tian , Mengyuan Song , Haoyang Yuan , Wenjun Lin , Chao Ai , Huajun Cao , Tao Huang , Aishui Yu
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引用次数: 0
Abstract
Interfacial side reaction is a major problem faced by solid state electrolyte (SSE), especially the oxidation reaction between high-voltage cathode materials and SSE. Herein, a double-layer PVCA-ETPTA|LAGP-PPC Janus solid electrolyte (JSE) with ultra-high interfacial stability is successfully designed. An oxidation tolerant cross-linked poly (Vinylene Carbonate) (PVCA)-Ethoxylated trimethylolpropane triacrylate (ETPTA) electrolyte is used on the cathode side, resulting in a stable interfacial layer under high-voltage. To enhance the stability of SSE|Li interface, a protective Li1.5Al0.5Ge1.5P3O12 (LAGP)-Poly (propylene carbonate) (PPC) layer is adhered to Li metal. The obtained dual-layer structure shows great thermal stability with an electrochemical stable window of 0–4.5 V. Moreover, the PVCA-ETPTA layer fabricated by in-situ polymerization helps building an integrated structure, which can significantly reduce the interfacial resistance. The ionic conductivity of LP|PE can reach 1.2 × 10−4 S cm−1 at 55 °C. As a consequence, the assembled NCM622|LP|PE|Li solid state cell shows exceptional electrochemical performance, with 70 % cycle retention for 100 cycles at 0.2 C.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems