首页|Flame-retardant ammonium polyphosphate/MXene decorated carbon foam materials as polysulfide traps for fire-safe and stable lithium-sulfur batteries

Flame-retardant ammonium polyphosphate/MXene decorated carbon foam materials as polysulfide traps for fire-safe and stable lithium-sulfur batteries

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Lithium-sulfur(Li-S)batteries are one of the most promising modern-day energy supply systems because of their high theoretical energy density and low cost.However,the development of high-energy density Li-S batteries with high loading of flammable sulfur faces the challenges of electrochemical performance degradation owing to the shuttle effect and safety issues related to fire or explosion accidents.In this work,we report a three-dimensional(3D)conductive nitrogen-doped carbon foam supported electro-static self-assembled MXene-ammonium polyphosphate(NCF-MXene-APP)layer as a heat-resistant,thermally-insulated,flame-retardant,and freestanding host for Li-S batteries with a facile and cost-effective synthesis method.Consequently,through the use of NCF-MXene-APP hosts that strongly anchor polysulfides,the Li-S batteries demonstrate outstanding electrochemical properties,including a high ini-tial discharge capacity of 1191.6 mA h g-1,excellent rate capacity of 755.0 mA h g-1 at 1 C,and long-term cycling stability with an extremely low-capacity decay rate of 0.12％per cycle at 2 C.More importantly,these batteries can continue to operate reliably under high temperature or flame attack conditions.Thus,this study provides valuable insights into the design of safe high-performance Li-S batteries.

Flame-retardantMXeneAmmonium polyphosphateSafetyLithium-sulfur battery

Yang Li、Yong-Cheng Zhu、Sowjanya Vallem、Man Li、Seunghyun Song、Tao Chen、Long-Cheng Tang、Joonho Bae

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Department of Physics,Gachon University,Seongnam-si,Gyeonggi-do 13120,South Korea

Key laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China

School of Materials Engineering,Changzhou Vocational Institute of Industry Technology,Changzhou 213164,Jiangsu,China

Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education,College of Material,Chemistry and Chemical Engineering,Hangzhou Normal University,Hangzhou 311121,Zhejiang,China

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National Research Foundation of KoreaInstitute of Information & communications Technology Planning & Evaluation(IITP)grant funded by the Korean government(MSIT)Applied Basic Research Program of Changzhou City

NRF-2021R1A2C10082722021-0-00259CJ20220030

2024

10.1016/j.jechem.2023.10.029

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
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