Multifunctionalized Safe Separator Toward Practical Sodium-Metal Batteries with High-Performance under High Mass Loading

Menghong Li; Guanjie Lu; Weikang ZhengQiannan ZhaoZhipeng LiXiaoping JiangZuguang YangZongyang LiBaihua QuChaohe Xu

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Multifunctionalized Safe Separator Toward Practical Sodium-Metal Batteries with High-Performance under High Mass Loading

机译：Multifunctionalized Safe Separator Toward Practical Sodium-Metal Batteries with High-Performance under High Mass Loading

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Introducing sodium as anode to develop sodium metal batteries (SMBs) is apromising approach for improving the energy density of sodium-ion batteries.However, fatal problems, such as uncontrollable sodium dendrite growth,unstable solid electrolyte interphase (SEI) in low-cost carbonate-based electrolytes,and serious safety issues, greatly impede the practical applications.Here, a multifunctionalized separator is rationally designed, by coating PPseparator (200 μm)and successfully solves all of the above problems, and for the first time creatshigh performance SMBs by using Na_3V_2(PO_4)_3 (NVP) cathodes in pouch cell.The Na||NVP full cells can stably cycle over 1200 times with capacity retentionof 80% at a high rate of 10 C and deliver a specific capacity of 80 mAh g~(?1)even at high rate of 30 C, indicating extraordinary fast-charging characters.The full SMBs can also stably cycle 200 times with a retention of 96.4% underhigh NVP loading of 10.7 mg cm~(?2). Most importantly, the SMB pouch cell canalso deliver a long-life cycles as well as high-temperature battery performance,which guarantees the safety of SMBs in practical application.

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来源
《Advanced functional materials》 |2023年第26期|2214759.1-2214759.10|共10页
作者
Menghong Li; Guanjie Lu; Weikang ZhengQiannan ZhaoZhipeng LiXiaoping JiangZuguang YangZongyang LiBaihua QuChaohe Xu;
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作者单位

College of Aerospace EngineeringChongqing UniversityChongqing 400044, P. R. China;

College of Materials Science and EngineeringChongqing UniversityChongqing 400044, P. R. China;

College of Materials Science and EngineeringChongqing UniversityChongqing 400044, P. R. China,National Engineering Research Center for Magnesium AlloysChongqing University Chongqing 400044, P. R. ChinaCollege of Aerospace EngineeringChongqing UniversityChongqing 400044, P. R. China,National Engineering Research Center for Magnesium AlloysChongqing University Chongqing 400044, P. R. ChinaPen-Tung Sah Institute of Micro-Nano Science and TechnologyXiamen UniversityXiamen 361005, P. R. ChinaBeijing Institute of Technology Chongqing Innovation CenterChongqing 401120, P. R. China;

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正文语种英语
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composite separators; pouch cells; safety; sodium metal batteries; wettability;

Multifunctionalized Safe Separator Toward Practical Sodium-Metal Batteries with High-Performance under High Mass Loading

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