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Organosilicon-group-derived silica-ionogel electrolyte for lithium ion batteries

Rare Metals 2018年第6期37卷 504-509页

作者： YueJiao Li Cui Guo LuShan Yue WenJie Qu Nan Chen YuJuan Dai RenJie Chen Feng Wu School of Material Science and Engineering Beijjing Institute of Technology Beijing 100081 China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081 China Beijing Jinghua Eduction School Beijing 100081 China

In order to avoid leakage problem caused by liquid electrolyte, a new ionogel electrolyte was developed by in situ immobilizing organosilicon-functionalized ionic liquid within a nanoporous silica matrix. The ionic liquid evenly coats on the surface of porous silica and fills in the silica framework pores with no strong chemical interaction. The ionogel electrolyte has the dual advantages of a silica solid support and a wide electrochemical stability window of ionic liquid （4.87 V vs. Li^＋/Li）. The half-cells assembled with this electrolyte and LiFePO4 electrode have excellent performance at room temperature and 60 ℃. The Li/SiO2-IGE/LiFePO4 cell displays a discharge capacity of 129.1 mAh·g^-1 after 200 charge/discharge cycles at room temperature.

关键词： ionogel electrolyte SiO2 Organosilicon group Ionic liquid

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Highly Integrated Perovskite Solar Cells-Based Photorechargeable System with Excellent Photoelectric Conversion and Energy Storage Ability

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Energy & Environmental Materials 2024年第5期7卷 336-344页

作者： Jinxin Bi Shaoyin Li Dongtao Liu Bowei Li Kai Yang Ming Xu Chaopeng Fu Yunlong Zhao Wei Zhang Advanced Technology Institute University of Surrey School of Materials Science and Engineering Shanghai Jiao Tong University Dyson School of Design Engineering Imperial College London National Physical Laboratory

Perovskite solar cells have emerged as a promising technology for renewable energy generation. However, the successful integration of perovskite solar cells with energy storage devices to establish high-efficiency and long-term stable photorechargeable systems remains a persistent challenge. Issues such as electrical mismatch and restricted integration levels contribute to elevated internal resistance, leading to suboptimal overall efficiency (ηoverall) within photorechargeable systems. Additionally, the compatibility of perovskite solar cells with electrolytes from energy storage devices poses another significant concern regarding their stability. To address these limitations, we demonstrate a highly integrated photorechargeable system that combines perovskite solar cells with a solid-state zinc-ion hybrid capacitor using a streamlined process. Our study employs a novel ultraviolet-cured ionogel electrolyte to prevent moisture-induced degradation of the perovskite layer in integrated photorechargeable system, enabling perovskite solar cells to achieve maximum power conversion efficiencies and facilitating the monolithic design of the system with minimal energy loss. By precisely matching voltages between the two modules and leveraging the superior energy storage efficiency, our integrated photorechargeable system achieves a remarkable ηoverallof 10.01%while maintaining excellent cycling stability.

关键词： ionogel electrolyte perovskite solar cells photorechargeable system self-powered electronics zinc-ion hybrid capacitor

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