journal article·2018-04-18

Nanoscaled Na3PS4 Solid Electrolyte for All-Solid-State FeS2/Na Batteries with Ultrahigh Initial Coulombic Efficiency of 95% and Excellent Cyclic Performances

Hongli Wan, Jean Pierre Mwizerwa, Xingguo Qi, Xiaoxiong Xu, Hong Li, Qiang Zhang, Liangting Cai, Yong-Sheng Hu, Xiayin Yao

ACS Applied Materials & Interfaces· Volume 10· Issue 15
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Abstract

Nanosized Na3PS4 solid electrolyte with an ionic conductivity of 8.44 × 10–5 S cm–1 at room temperature is synthesized by a liquid-phase reaction. The resultant all-solid-state FeS2/Na3PS4/Na batteries show an extraordinary high initial Coulombic efficiency of 95% and demonstrate high energy density of 611 Wh kg–1 at current density of 20 mA g–1 at room temperature. The outstanding performances of the battery can be ascribed to good interface compatibility and intimate solid–solid contact at FeS2 electrode/nanosized Na3PS4 solid electrolytes interface. Meanwhile, excellent cycling stability is achieved for the battery after cycling at 60 mA g–1 for 100 cycles, showing a high capacity of 287 mAh g–1 with the capacity retention of 80%.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

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Affiliations

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 315201 Ningbo, P. R. China

University of Chinese Academy of Science, 100049 Beijing, P.R. China

Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190 Beijing, P.R. China

Funding

Ministry of Science and Technology of the People's Republic of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · Natural Science Foundation of Zhejiang Province · Chinese Academy of Sciences

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