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Confining ultrafine Li3P nanoclusters in porous carbon for highperformance lithium-ion battery anode

Nano Research 2020年第4期13卷 1122-1126页

作者： Eryang Mao Wenyu Wang Mintao Wan Li Wang Xiangming He Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

High-capacity lithium-containing alloy anodes(e.g.,Li4.4Si,Li4.4Sn,and Li3P)enable lithium-free cathodes(e.g.,Sulfur,V2O5,and FeF3)to produce next-generation lithium-ion batteries(LIBs)with high energy density.Herein,we design a Li3P/C nanocomposite with Li3P ultrafine nanodomains embedded in micrometer-scale porous carbon particles.Benefiting from the unique micro/nanostructure of the Li3P/C nanocomposite,electrons transfer rapidly through the conductive pathway provided by the porous carbon framework and the volume change between Li3P and P is confined in the nanopores of the carbon,which avoids the collapse of the whole Li3P/C composite particles.As expected,the as-achieved Li3P/C nanocomposite provided a high available lithium-ion capacity of 791 mAh/g(calculated based on the mass of Li3P/C)at 0.1 C during the initial delithiation process.Meanwhile,the Li3P/C nanocomposite showed 75%of its 0.5 C capacity at 6 C and stable cycling stability.

关键词： Li3P nanoclusters porous carbon lithium-containing anode high capacity lithium-ion batteries

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Insights on“nitrate salt”in lithium anode for stabilized solid electrolyte interphase

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Carbon Energy 2022年第1期4卷 12-20页

作者： Lin Fu Xiancheng Wang Zihe Chen Yuanjian Li Eryang Mao Zhi Wei Seh Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanChina Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

A Li/KNO_(3) composite(LKNO),with KNO_(3) uniformly implanted in bulk metallic Li,is fabricated for battery anode via a facile mechanical kneading approach,which exhibits high Coulombic efficiency and prolonged cycle life.The mechanism behind the enhanced electrochemical performance of the“salt-in-metal”composite is investigated,where KNO_(3) in metallic Li composite electrode would be sustainably released into the electrolyte.The presence of NO_(3)-stabilizes the solid electrolyte interphase by producing functional Li_(3)N,LiNxOy,and Li_(2)O species.K^(+)from KNO_(3) also helps to form an electrostatic shield after its adsorption on the electrode protrusions,which suppresses the dendritic growth of metallic Li.With the above advantages,uniform Li plating with dense and planar structure is realized for the LKNO electrode.These findings reveal a deep understanding of the effect of the“saltin-metal”anode and provide new insights into the use of nitrate additives for high-energy-density Li metal batteries.

关键词： electrostatic shield Li metal battery Li/KNO_(3)composite salt-in-metal stabilized solid electrolyte interphase sustained release

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A novel battery scheme:Coupling nanostructured phosphorus anodes with lithium sulfide cathodes

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Nano Research 2020年第5期13卷 1383-1388页

作者： David Sichen Wu Guangmin Zhou Eryang Mao Yongming Sun Bofei Liu Li Wang Jiangyan Wang Feifei Shi Yi Cui Department of Materials Science and Engineering Stanford UniversityStanfordCalifornia 94305USA Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory2575 Sand Hill RoadMenlo ParkCalifornia 94025USA

Lithium-ion batteries are approaching their theoretical limit and can no longer keep up with the increasing demands of human society.Lithium-sulfur batteries,with a high theoretical specific energy,are promising candidates for next generation energy storage.However,the use of Li metal in Li-S batteries compromises both safety and performance,enabling dendrite formation and causing fast capacity degradation.Previous studies have probed alternative battery systems to replace the metallic Li in Li-S system,such as a Si/Li2S couple,with limited success in performance.Recently,there is a focus on red P as a favorable anode material to host Li.Here,we establish a novel battery scheme by utilizing a P/C nanocomposite anode and pairing it with a Li2S coated carbon nanofiber cathode.We find that red P anode can be compatible in ether-based electrolyte systems and can be successfully coupled to a Li2S cathode.Our proof of concept full-cell displays remarkable specific capacity,rate and cycling performances.We expect our work will provide a useful alternative system and valuable insight in the quest for next generation energy storage devices.

关键词： lithium sulfur batteries red phosphorus lithium sulfide

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锂离子电池高容量合金基含锂负极材料的研究进展

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高等学校化学学报 2021年第5期42卷 1552-1568,I0004页

作者：毛尔洋王莉孙永明华中科技大学武汉光电国家研究中心武汉430074 清华大学核能与新能源技术研究院北京100084

现有的以石墨为负极的锂离子电池能量密度逐渐接近其理论极限.基于合金化反应机制的高容量含锂负极材料LixMy(M为能够和锂发生合金化反应的元素)是一类新兴的负极材料,具有数倍于石墨的储锂比容量,且可以为电池提供活性锂源.这些特性使... 详细信息

现有的以石墨为负极的锂离子电池能量密度逐渐接近其理论极限.基于合金化反应机制的高容量含锂负极材料LixMy(M为能够和锂发生合金化反应的元素)是一类新兴的负极材料,具有数倍于石墨的储锂比容量,且可以为电池提供活性锂源.这些特性使其能够与高容量无锂正极材料(如S,O_(2),FeF_(3)和V_(2)O_(5)等)相匹配,构建下一代高比能锂离子电池新体系.本文综述了近年来高容量合金基含锂负极材料(如LixSi,LixSn,Li_(3)P和Li_(x)Al基系列材料)的研究进展,分析了所面临的挑战,概述了材料的合成与电极的制备方法,并介绍了它们在常规锂离子电池、锂离子-硫电池及锂离子-空气电池等多个全电池体系中的应用实例,提出并举证了其电化学性能优化与调控的策略,最后展望了未来的研究方向.

关键词：含锂负极锂合金高容量高比能锂离子电池

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