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CNTs@S composite as cathode for all-solid-state lithium-sulfur batteries with ultralong cycle life

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Journal of Energy Chemistry 2020年第1期29卷 151-155,I0006页

作者： Qiang Zhang Ning Huang Zhen Huang Liangting Cai Jinghua Wu xiayin yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The main challenges in development of traditional liquid lithium-sulfur batteries are the shuttle effect at the cathode caused by the polysulfide and the safety concern at the Li metal anode arose from the dendrite ***-solid-state lithium-sulfur batteries have been proposed to solve the shuttle effect and prevent short ***,solid-solid contacts between the electrodes and the electrolyte increase the interface resistance and stress/strain,which could result in the limited electrochemical *** this work,the cathode of all-solid-state lithium-sulfur batteries is prepared by depositing sulfur on the surface of the carbon nanotubes(CNTs@S)and further mixing with Li10GeP2S12 electrolyte and acetylene black *** 60℃,CNTs@S electrode exhibits superior electrochemical performance,delivering the reversible discharge capacities of 1193.3,959.5,813.1,569.6 and 395.5 mAhg^-1 at the rate of 0.1,0.5,1,2 and 5 C,***,the CNTs@S is able to demonstrate superior high-rate capability of 660.3 mAhg^-1 and cycling stability of 400 cycles at a high rate of 1.0 *** uniform distribution of the CNTs,S and Li10GeP2S12 electrolyte increase the electronic and ionic conductivity between the cathode and the electrolyte hence improves the rate performance and capacity retention.

关键词： CNTs@S composite All-solid-state lithium-sulfur battery Electronic conduction network Interfacial contact Ultralong cycle life

Homogeneous precipitation of α-phase Co-Ni hydroxides hexagonal platelets

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Particuology 2012年第1期10卷 24-28页

作者： Juanjuan Liu Xuyang Wang xiayin yao Jun wang Zhaoping Liu Ningbo Institute of Material Technology ＆ Engineering Chinese Academy of Sciences Ningbo 315201 China

This paper describes the synthesis of （x-phase Co-Ni hydroxides hexagonal platelets through homo- geneous precipitation, using hexamethylenetetramine （HMT） or urea as a hydrolytic agent. In the CoC12-NiC12-HMT system, pure β-phase can be synthesized at the concentrations of both metal ions higher than 20 raM, while in the CoCl2-NiCl2-urea system, the formation of pure α-phase is independent of the concentrations of the metal ions. When using HMT, monodisperse hexagonal platelets of α-phase Co-Ni hydroxides can be produced in the presence of polyvinylpyrrolidone （PVP）. Cyclic voltammogram curve of the hexagonal platelets prepared with HMT demonstrates electrochemical performance superior to that of urea.

关键词： Homogeneous precipitation α-PhaseHydrolysisHexagonal plateletsCyclic voltammogram

In situ formed LiF-Li_(3)N interface layer enables ultra-stable sulfide electrolyte-based all-solid-state lithium batteries

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Journal of Energy Chemistry 2023年第4期79卷 272-278页

作者： Ming Wu Mengqi Li Yuming Jin Xinshuang Chang Xiaolei Zhao Zhi Gu Gaozhan Liu xiayin yao School of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211ZhejiangChina Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Sulfide solid electrolytes are promising for high energy density and safety in all-solid-state batteries due to their high ionic conductivity and good mechanical ***,the application of sulfide solid electrolytes in all-solid-state batteries with lithium anode is restricted by the side reactions at lithium/electrolytes interfaces and the growth of lithium dendrite caused by nonuniform lithium ***,a homogeneous LiF-Li_(3)N composite protective layer is in situ formed via a manipulated reaction of pentafluorobenzamide with Li *** LiF-Li_(3)N layer with both high interfacial energy and interfacial adhesion energy can synergistically suppress side reactions and inhibit the growth of lithium dendrite,achieving uniform deposition of *** critical current densities of Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl are increased to 3.25 and 1.25 mA cm^(-2)with Li@LiF-Li_(3)N layer,which are almost triple and twice as those of Li-symmetric cells in the absence of protection layer,***,the Li@LiF-Li_(3)N/Li10GeP2S12/Li@LiF-Li_(3)N cell can stably cycle for 9000 h at 0.1 mA cm^(-2)under 0.1 mA h cm^(-2),and Li@LiF-Li_(3)N/Li_(6)PS_(5)Cl/Li@LiF-Li_(3)N cell achieves stable Li plating/stripping for 8000 h at 0.1 mA cm^(-2)under10 m A h cm^(-2).The improved dynamic stability of lithium plating/stripping in Li@LiF-Li_(3)N/Li_(10)GeP_(2)S_(12)or Li_(6)PS_(5)Cl interfaces is proved by three-electrode *** a result,LiCoO_(2)/electrolytes/Li@LiF-Li_(3)N batteries with Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl exhibit remarkable cycling stability of 500 cycles with capacity retentions of 93.5%and 89.2%at 1 C,respectively.

关键词： LiF-Li_(3)N Sulfide solid electrolytes Interface modification High interface energy All-solid-state batteries

Air exposure towards stable Li/Li_(10)GeP_(2)S_(12) interface for all-solid-state lithium batteries

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Materials Futures 2022年第2期1卷 1-8页

作者： Wei Weng Dong Zhou Gaozhan Liu Lin Shen Mengqi Li Xinshuang Chang xiayin yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Moist air is a great challenge for manufacturing sulfide-based all-solid-state lithium batteries as the water in air will lead to severe decomposition of sulfide electrolytes and release H2S ***,different with direct reaction with water,short-period air exposure of Li_(10)GeP_(2)S_(12) sulfide electrolyte with controlled humidity can greatly enhance the stability of Li_(10)GeP_(2)S_(12) against lithium metal,thus realizing stable Li_(10)GeP_(2)S_(12) based all-solid-state lithium metal *** air exposure,partial hydrolysis reaction occurs on the surface of Li_(10)GeP_(2)S_(12) pellets,rapidly generating a protective decomposition layer of Li4P2S6,GeS2 and Li2HPO3 in dozens of *** ionically conductive but electronically insulation protecting layer can effectively prevent the severe interface reaction between Li_(10)GeP_(2)S_(12) and lithium metal during electrochemical *** Li/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li cell shows long cycling stability for 1000 *** the LiCoO_(2)/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li batteries present good rate capability and long cyclic performances,showing capacity retention of 80%after 100 cycles.

关键词： Li_(10)GeP_(2)S_(12) lithium metal interface stability air-exposure treatment all-solid-state lithium batteries

20μm-Thick Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)-Based Flexible Solid Electrolytes for All-Solid-State Lithium Batteries

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Energy Material Advances 2022年第1期2022卷 206-213页

作者： Qingya Guo Fanglin Xu Lin Shen Shungui Deng Zhiyan Wang Mengqi Li xiayin yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The doped garnet-type solid electrolytes are attracting great interest due to high ionic conductivity and excellent electrochemical stability against Li ***,the thick electrolyte layer and rigid nature as well as poor interfacial contact are huge obstacles for its application in all-solid-state lithium ***,an ultrathin flexible Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)-(LLZTO-)based solid electrolyte with 90 wt%LLZTO content is realized through solvent-free *** resultant 20μm-thick LLZTO-based film exhibits ultrahigh ionic conductance of 41.21 mS at 30℃,excellent oxidation stability of 4.6 V,superior thermal stability and ***,the corresponding Li||Li symmetric cell can stable cycle for more than 2000 h with low overpotential at 0.1mAcm^(-2)under 60℃.The assembled Li||LiFePO4 pouch cell with integrated electrolyte/cathode interface exhibits excellent rate performances and cycle performances with a capacity retention of 71.4%from 153 mAh g^(-1)to 109.2 mAh g^(-1)at 0.1 C over 500 cycles under 60℃.This work provides a promising strategy towards realizing ultrathin flexible solid electrolyte for high-performance all-solid-state lithium batteries.

关键词： electrolyte Solid stability

All-Solid-State Lithium Batteries with Sulfide Electrolytes and Oxide Cathodes

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Electrochemical Energy Reviews 2021年第1期4卷 101-135页

作者： Jinghua Wu Lin Shen Zhihua Zhang Gaozhan Liu Zhiyan Wang Dong Zhou Hongli Wan Xiaoxiong Xu xiayin yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Zhejiang Funlithium New Energy Technology Co. Ltd.Ningbo 315201ZhejiangChina Ganfeng Lithium Co. Ltd.Xinyu 338015JiangxiChina

All-solid-state lithium batteries(ASSLBs)have attracted increasing attention due to their high safety and energy *** all corresponding solid electrolytes,sulfide electrolytes are considered to be the most promising ion conductors due to high ionic *** this,many challenges remain in the application of ASSLBs,including the stability of sulfide electrolytes,complex interfacial issues between sulfide electrolytes and oxide electrodes as well as unstable anodic *** oxide cathodes remain the most viable electrode materials due to high stability and industrialization degrees,the matching of sulfide electrolytes with oxide cathodes is challenging for commercial use in *** on this,this review will present an overview of emerging ASSLBs based on sulfide electrolytes and oxide cathodes and high-light critical properties such as compatible electrolyte/electrode *** by considering the current challenges and opportunities of sulfide electrolyte-based ASSLBs,possible research directions and perspectives are discussed.

关键词： All-solid-state lithium batteries Sulfide electrolytes Oxide cathodes Interfaces

Nitrogen doped hollow carbon nanospheres as efficient polysulfide restricted layer on commercial separators for high-performance lithium-sulfur batteries

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Chinese Chemical Letters 2023年第2期34卷 613-617页

作者： Yue Zhao Zhi Gu Wei Weng Dan Zhou Ziqiang Liu Wentong Fan Shungui Deng Hao He xiayin yao Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of NottinghamNingbo 315100China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology College of Materials Science and EngineeringYangtze Normal UniversityChongqing 408100China

The polysulfide shuttle limits the development of lithium-sulfur(Li-S) batteries with high energy density and long lifespan. Herein, nitrogen doped hollow carbon nanospheres(NHCS) derived from polymerization of dopamine on SiO_(2)nanospheres are employed to modify the commercial polypropylene/polyethylene/polypropylene tri-layer separators(PP/PE/PP@NHCS). The abundant nitrogen heteroatoms in NHCS exhibit strong chemical adsorption toward polysulfides, which can effectively suppress the lithium polysulfides shuttle and further enhance the utilization of active sulfur. Lithium-sulfur batteries employing the PP/PE/PP@NHCS deliver an initial discharge capacity of 1355 mAh/g and retain high capacity of 921 mAh/g after 100 cycles at 0.2 C. At a high rate of 2 C, the lithium-sulfur batteries exhibit capacity of 461 mAh/g after 1000 cycles with a capacity fading rate of 0.049% per cycle. This work demonstrates that the NHCS coated PP/PE/PP separator is promising for future commercial applications of lithium-sulfur batteries with improved electrochemical performances.

关键词： Nitrogen doped hollow carbon nanospheres Separator modification Shuffle effect Polysulfides Lithium-sulfur batteries

High conductivity polymer electrolyte with comb-like structure via a solvent-free UV-cured method for large-area ambient all-solid-sate lithium batteries

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Journal of Materiomics 2019年第2期5卷 195-203页

作者： Zhihao Wang Shaojie Chen Zhen Huang Zhenyao Wei Lin Shen Hui Gu Xiaoxiong Xu xiayin yao Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo315201China School of Materials Science and Engineering Shanghai UniversityShanghai200444China

A novel solid polymer electrolyte with comb-like structure is prepared via a solvent-free UV-cured *** relationship between conductivity and molecular weight is investigated and *** optimal electrolyte presents a considerably high conductivity of 1.44·10^(-4)S·cm^(-1)at 30℃.Meanwhile,it shows excellent compatibility with metallic lithium and wide electrochemical window(>5 V).To investigate the safety and cycling performance,the coin cell and soft package battery are assembled *** LiFePO_(4)/Li coin cells exhibit initial discharge specific capacities of 163.2,147.7,137.3 and 108.7 mA·h·g^(-1)at 0.1,0.2,0.5 and 1C under 60℃,***,when the coin cells work at 30℃,the initial discharge specific capacities at 0.05,0.1,0.2 and 0.5C are 140.5,133.5,107.7 and 55.6 mA·h·g^(-1).Significantly,a 3.5 cm×7 cm solid-state soft pack battery is fabricated and cycling at 30℃.The first discharge capacity reaches to 137.5 mA·h·g^(-1)and the capacity retention is as high as 84.4%after 100 cycles at 0.2C and remain 95.5%after 100 cycles at 0.5C,*** results shows a promising solid polymer electrolyte for solid-state batteries with good cycling and safety performance.

关键词： Poly(ethylene glycol)methyl ether methacrylate UV-cured High conductivity Large-area all-solid-state lithium battery Safety test

Sodiophilic and conductive carbon cloth guides sodium dendrite-free Na metal electrodeposition

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Journal of Energy Chemistry 2021年第10期30卷 61-70,I0003页

作者： Haijun Liu Markus Osenberg Ling Ni André Hilger Libao Chen Dong Zhou Kang Dong Tobias Arlt xiayin yao Xiaogang Wang Ingo Manke Fu Sun Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences 266101 QingdaoShandongChina Institute of Applied Materials Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 114109 BerlinGermany State Key Laboratory for Powder Metallurgy Central South University410083 ChangshaHunanChina Ningbo Institute of Materials Technology&Engineering Chinese Academy of Sciences 315201 NingboZhejiangChina

Sodium metal battery(SMB)technology is one of the most promising candidates for next-generation rechargeable energy storage systems due to its high theoretical capacity and economical ***,its practical implementation is hindered by several challenges including short life-span and fast capacity decay,which is closely related to the uncontrollable generation of the sodium ***,a nitrogen and oxygen co-doped three-dimensional carbon cloth with hollow tubular fiber units was constructed as the host material for Na plating(Na@CC)to tackle these *** obtained composite electrode can effectively reduce the nucleation overpotential of Na,guide the homogeneous Na^(+)flux,increase the kinetics of Na electrodeposition,lower the effective current density and eventually suppress the formation of electrochemically inactive Na *** a result,batteries built with the Na@CC composites exhibited stable long-term cycling *** gain an in-depth and comprehensive understanding of such phenomena,non-destructive and three-dimensional synchrotron X-ray tomography was employed to investigate the cycled ***,the COMSOL Multiphysics simulation was further employed to reveal the Na electrodeposition *** current work not only showcases the feasibility of currently proposed sodiophilic 3 D Na@CC composite electrode but also provides fundamental insights into the underlying working mechanisms that govern its outstanding electrochemical performance.

关键词： Na metal anode Dendrite-free electrode Sodiophilicity Synchrotron X-ray imaging Tomography