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Particuology 2024年第8期91卷 29-37页

作者： Ying Jiang Chen Sun Feilong Dong haiming xie Liqun Sun National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun130024China

The separator plays an important part in battery safety and *** separators are widely used in commercial Lithium-ion batteries(LIBs),owing to their excellent properties,but they suffer from serious thermal shrinkage and poor electrolyte ***,a multilayer separator(ASPESA)is developed by coating two thin layers of low-density polyethylene(LDPE)and Al_(2)O_(3)on both sides of a polyethylene membrane using a facile and environmentally friendly casting *** ASPESA separator demonstrates a shutdown function at 120℃and shows enhanced thermal stability under 185℃,with a small thermal shrinkage of 1%.Meanwhile,the LDPE and Al_(2)O_(3)layers can improve the electrolyte wettability and electrolyte uptake(407.23%).The multilayer ASPESA separator delivers an excellent cycle performance in LiFePO_(4)||Li cells with a discharge capacity of 144.5 mAh g^(-1)after 900 cycles,with a high-capacity retention of 98.9%(compared to the 5th cycle).Therefore,the multilayer ASPESA separator has great utilization potential as a high-safety separator in LIBs.

关键词： Low-density polyethylene microspheres Al_(2)O_(3)particles Thermal shutdown High safety Lithium-ionbatteries

Enhancing Li-S battery performance via functional polymer binders for polysulfide inhibition

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Journal of Energy Chemistry 2024年第10期97卷 228-236,I0005页

作者： Jinpeng Jian Qian Chen Hao Sun Rui Li Yaolin Hou Yulong Liu Jia Liu haiming xie Jiefang Zhu Nation&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024JjilinChina Jilin Province Dongchi New Energy Technology Co. Ltd.Changchun 13000oJilinChina Department of Chemistry-Angstrom Laboratory Uppsala UniversitySE-75121Sweden

The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox *** this study,we introduce a novel polymer via a simple cross-linking between poly(ether-thioureas)(PETU)and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)as a bifunctio nal binder for Li-S batteries(devotes as"PPTU").Compared to polyvinylidene fluoride(PVDF),as-prepared PPTU exhibits significantly higher electrical conductivity,facilitating electrochemical ***,PPTU demonstrates effective adsorption of lithium polysulfides,leading to improved cycling stability by suppressing the shuttling *** investigate this behavior by monitoring morphological changes at the cell interface using synchrotron X-ray *** with PPTU binders exhibit remarkable rate performance,desired reversibility,and excellent cycling stability even under stringent bending and twisting *** work represents promising progress in functional polymer binder development for Li-S batteries.

关键词： Li-S batteries Bifunctional binders Electrode conductivity Shuttle effect

Synergetic Control of Li^(+)Transport Ability and Solid Electrolyte Interphase by Boron-Rich Hexagonal Skeleton Structured All-Solid-State Polymer Electrolyte

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Energy & Environmental Materials 2024年第3期7卷 154-163页

作者： Yanan Li Shunchao Ma Yuehua Zhao Silin Chen Tingting Xiao Hongxing Yin Huiyu Song Xiumei Pan Lina Cong haiming xie Department of Chemistry National&Local United Engineering Laboratory for Power BatteryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China

High Li^(+)transference number electrolytes have long been understood to provide attractive candidates for realizing uniform deposition of Li^(+).However,such electrolytes with immobilized anions would result in incomplete solid electrolyte interphase(SEI)formation on the Li anode because it suffers from the absence of appropriate inorganic components entirely derived from anions ***,a boron-rich hexagonal polymer structured all-solid-state polymer electrolyte(BSPE+10%LiBOB)with regulated intermolecular interaction is proposed to trade off a high Li^(+)transference number against stable SEI *** Li^(+)transference number of the as-prepared electrolyte is increased from 0.23 to 0.83 owing to the boron-rich cross-linker(BC)*** intriguingly,for the first time,the experiments combined with theoretical calculation results reveal that BOB^(-)anions have stronger interaction with B atoms in polymer chain than TFSI^(-),which significantly induce the TFSI^(-)decomposition and consequently increase the amount of LiF and Li3N in the SEI ***,a LiFePO_(4)|BSPE+10%LiBOBlLi cell retains 96.7%after 400 cycles while the cell without BC-resisted electrolyte only retains 40.8%.BSPE+10%LiBOB also facilitates stable electrochemical cycling of solid-state Li-S *** study blazes a new trail in controlling the Li^(+)transport ability and SEI properties,synergistically.

关键词： all-solid-state electrolyte boron-rich polymer lithium metal batteries lithium-ion transference number solid electrolyte interphase layer

AgTFSI Pretreated Li Anode in LiI-Mediated Li-O_(2)Battery:Enabling Lithiophilic Solid Electrolyte Interphase Generation to Suppress the Redox Shuttling

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CCS Chemistry 2024年第10期6卷 2400-2410页

作者： Yuqing Zhang Qian Chen Dan Li Shuang Qi Yulong Liu Jia Liu haiming xie Jiefang Zhu Nation&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024 Jilin Province Dongchi New Energy Technology Co. Ltd.Changchun 130000 Department of Chemistry-Ångström Laboratory Uppsala UniversityUppsala 75121 The Key Laboratory for Ultrafine Materials of The Ministry of Education East China University of Science and TechnologyShanghai 200237

Although lithium iodide(LiI)as a redox mediator(RM)can decrease the overpotential in Li-O_(2)batteries,the stability of the Li anode is still one critical issue due to the redox ***,we firstly present a novel approach for generating Ag and LiTFSI enriched Li anode(designated as ALE@Li anode)via a spontaneous substitution between pure Li and bis(trifluoromethanesulfonyl)imide silver,in a LiI-participated Li-O_(2)*** can induce the generation of a lithiophilic solid electrolyte interphase(SEI)enriched with Ag,F,and N species(e.g.,Ag_(2)O,Li-Ag alloy,LiF,and Li_(3)N)during cell operation,which contributes to promoting the electrochemical performance through the shuttling *** to a cell with a bare Li anode,the one with as-prepared ALE@Li anode shows an enhanced cyclability,a considerable rate capability,and a good *** addition,a synchrotron X-ray computed tomography technique is employed to investigate the inhibition mechanism for shuttling effect by monitoring the morphological evolution on the cell ***,this work highlights the deliberate design in the modified Li anode in an easy-to-operate and cost-effective way as well as providing guidance for the construction of artificial SEI layers to suppress the redox shuttling of RMs in Li-O_(2)batteries.

关键词： redox shuttling modified Li anode artificial SEI layer synchrotron X-ray computed tomography Li-O_(2)batteries

A Self-Healing and Nonflammable Cross-Linked Network Polymer Electrolyte with the Combination of Hydrogen Bonds and Dynamic Disulfide Bonds for Lithium Metal Batteries

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Energy & Environmental Materials 2023年第4期6卷 106-113页

作者： Kai Chen Yuxue Sun Xiaorong Zhang Jun Liu haiming xie Department of Chemistry National&Local United Engineering Laboratory for Power BatteryNortheast Normal UniversityChangchun 130024China

The self-healing solid polymer electrolytes(SHSPEs)can spontaneously eliminate mechanical damages or micro-cracks generated during the assembly or operation of lithium-ion batteries(LIBs),significantly improving cycling performance and extending service life of ***,we report a novel cross-linked network SHSPE(PDDP)containing hydrogen bonds and dynamic disulfide bonds with excellent self-healing properties and *** combination of hydrogen bonding between urea groups and the metathesis reaction of dynamic disulfide bonds endows PDDP with rapid self-healing capacity at 28°C without external ***,the addition of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide(EMIMTFSI)improves the ionic conductivity(1.13×10^(−4)S cm^(−1)at 28°C)and non-flammability of *** assembled Li/PDDP/LiFePO_(4)cell exhibits excellent cycling performance with a discharge capacity of 137 mA h g^(−1)after 300 cycles at 0.2 *** importantly,the self-healed PDDP can recover almost the same ionic conductivity and cycling performance as the original PDDP.

关键词： cross-linked network dynamic disulfide bonds lithium-ion batteries nonflammable self-healing solid polymer electrolytes

C band single pump photonic crystal fiber Raman amplifier

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Chinese Science Bulletin 2010年第6期55卷 555-559页

作者： JIANG haiming xie Kang WANG YaFei School of Optoelectronie Information University of Electronic Science and Technology of China Chengdu 610054 China

A novel twin-core photonic crystal fiber was proposed to reduce the complexity and cost of fiber Raman *** means of a proper design,this fiber could acquire a higher and flatter Raman gain efficiency coefficient curve rR=gR/Aeff over a specified band of wavelength than a conventional fiber.A Raman amplifier was designed with this novel twin-core photonic crystal fiber to operate in C band from 1530 nm to 1565 nm.A remarkable improvement over a conventional fiber Raman amplifier was *** was numerically demonstrated that when pumped with a single source,an average gain of 8.7 dB with a fluctuation of less than 0.9 dB is achievable.

关键词：光纤拉曼放大器光子晶体光纤 C波段单泵设计方法增益系数光纤波长复杂性

An optimum route to prepare FePO_4 ·2H_2O and its use as an iron source to synthesize LiFePO_4

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Science China Chemistry 2013年第5期56卷 576-582页

作者： LI MingJuan SUN LiQun SUN Kai WANG RongShun xie haiming Institute of Functional Materials Department of Chemistry Northeast Normal University LIB Engineering Laboratory Materials Science and Technology Center

LiFePO4 cathode material is synthesized by a simple solid-state reaction method with FePO42H20 as iron source and citric acid as reductive agent and carbon source. This study examines the effects of different oxidation routes to prepare FePO4＂2H20 on the electrochemical performance of as-synthesized LiFePO4. Iron phosphate was prepared by two routes from FeSO4＇7H20. One is the formation of Fe3（PO4）2 precipitate in the first step and subsequent oxidation to FePO4 precipitate. The other is the oxidation of ferrous to ferric ion firstly, and then to form FePO4 precipitate directly. The results indicate that substantial differences in the structure and electrochemical properties of LiFePO4 depend on the behavior of FePO4. Iron phosphate obtained through one step precipitation has a smaller particle size and more uniform particle distribution, which is demonstrated to be more applicable as the iron source to synthesize LiFePO4/C. As-prepared LiFePO4/C shows an excellent rate capability and cycle performance. The initial discharge capacities of 160.6 mAh/g and 107 mAh/g are achieved at 0.1 C and 10 C, respectively. The good capacity retention of 97% after 300 cycles is maintained at the rate of 5 C.

关键词： lithium ion batteries cathode LiFePO4 FePO4 ·2H2O ectrochemical property

MoO2 nanoparticles/carbon textiles cathode for high performance flexible Li-O2 battery

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Journal of Energy Chemistry 2020年第8期29卷 66-71,I0003页

作者： Jia Liu Dan Li Ying Wang Siqi Zhang Ziye Kang haiming xie Liqun Sun National&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024JilinChina

Conventional Li-O2 battery is hardly considered as a next-generation flexible electronics thus far,since it is inflexible,bulk,and limited by the absence of the adjustable cell ***,we report a binder-free and flexible electrode of x wt%MoO2 NPs/CTs(x=6,16,and 28).A cell with 16 wt% MoO2 NPs/CTs displays a good cyclability over 240 cycles with a low overpotential of 0.33 V on the 1st cycle at a constant current density of 0.2 mA cm-2,a considerable rate performance,a superior reversibility associated with the desired formation and degradation of Li2O2,and a high electrochemical stability even under stringent bending and twisting *** work represents a promising progress in the material development and architecture design of O2 electrode for flexible Li-O2 batteries.

关键词： MoO2 nanoparticles Flexible electrode Li-O2 battery High electrochemical stability

Unveiling and Alleviating Chemical“Crosstalk”of Succinonitrile Molecules in Hierarchical Electrolyte for High-Voltage Solid-State Lithium Metal Batteries

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Energy & Environmental Materials 2023年第3期6卷 107-116页

作者： Fang Fu Ying Liu Chen Sun Lina Cong Yulong Liu Liqun Sun haiming xie National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun 130024China

Succinonitrile-based plastic crystal electrolytes have emerged for high-energy-density Li metal batteries in terms of their superior ambient ionic conductivity,low flammability,and benign compatibility with high voltage cathode,but are hampered by inherent instabilities toward Li *** hierarchical solid electrolytes structure is a fundamental approach to protect Li anode from succinonitrile attacks,with succinonitrile-based oxidation-resistance layer facing high voltage cathode and reduction-tolerant layer contacting Li ***,free succinonitrile molecules in succinonitrile-based electrolyte layer can diffuse across the electrolyte/electrolyte interface and further reach Li anode surface during the battery *** chemical“crosstalk”cause reduction-tolerant electrolyte layer to fail to protect the Li anode from the attacks of free succinonitrile *** Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)is introduced creatively into succinonitrile-based electrolyte *** taking advantage of the complexation between La atoms in Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)and N atoms in succinonitrile,the free succinonitrile molecules are successfully immobilized in succinonitrile-based electrolyte *** resulting low resistance and highly durable solid electrolyte interphase and cathode electrolyte interphase endow NCM622||Li batteries with remarkable cycle *** research provides a new idea for the real application of plastic crystal electrolytes in high voltage solid-state lithium metal batteries.

关键词： hierarchical solid electrolytes high voltage interface lithium metal plastic crystal

20μm Li metal modified with phosphate rich polymer-inorganic interphase applied in commercial carbonate electrolyte

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Journal of Energy Chemistry 2023年第1期76卷 233-238,I0006页

作者： Lin Lin Wei Lu Feipeng Zhao Siru Chen Jia Liu haiming xie Yulong Liu School of Chemistry Northeast Normal UniversityChangchun 130024JilinChina Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal UniversityChangchun 130103JilinChina College of Information Technology Jilin Normal UniversitySiping 13600oJilinChina Department of Mechanical and Materials Engineering Western UniversityLondon N6A 3K7Canada

Li metal batteries are supposed to reach real application in order to fulfill the high-energy density requirement of energy storage ***,the commonly used carbonate electrolyte react with pristine Li,which result in short lifetime of lithium metal *** alleviate the side reactions of Li metal with liquid electrolyte,here we propose a phosphate rich polymer-inorganic layer as an *** to the inert properties of lithium phosphate derived from LiPO_(2)F_(2)and poly-ether,the side-reaction of carbonate solvent are *** a result,lithium metal anode sustains for 800 cycles in symmetrical cell test under 1 m A cm^(-2).Even under strict condition(20μm Li,capacity ratio N/P=2.3,electrolyte/active material=3μL mg^(-1)),coin cell test still runs stable for 150 cycles with high Coulombic ***,both LiFePO_(4)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)pouch cell under 5μL m A^(-1)h^(-1)condition also exhibit good stability at 0.5 C and 2 C *** this approach,high-energy and high-power Li metal batteries are approaching to real application in the near future.

关键词： Lithium metal anode Lithium phosphate Ultra-thin Lithium Solid electrolyte interphase