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Lithium-Ion Charged Polymer Channels Flattening Lithium Metal Anode

Nano-Micro Letters 2024年第4期16卷 379-393页

作者： Haofan Duan Yu You Gang Wang Xiangze Ou Jin Wen Qiao huang Pengbo Lyu Yaru Liang Qingyu Li Jianyu huang Yun‑Xiao Wang hua‑kun liu Shi Xue Dou Wei‑Hong Lai Hunan Provincial Key Laboratory of Thin Film Materials and Devices School of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105People’s Republic of China Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemical and Pharmaceutical ScienceGuangxi Normal UniversityGuilin 541004People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2500Australia Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghai 200093People’s Republic of China

The concentration difference in the near-surface region of lithium metal is the main cause of lithium dendrite *** this issue will be key to achieving high-performance lithium metal batteries(LMBs).Herein,we construct a lithium nitrate(LiNO_(3))-implanted electroactiveβphase polyvinylidene fluoride-co-hexafluoropropylene(PVDF-HFP)crystalline polymorph layer(PHL).The electronegatively charged polymer chains attain lithium ions on the surface to form lithium-ion charged *** channels act as reservoirs to sustainably release Li ions to recompense the ionic flux of electrolytes,decreasing the growth of lithium *** stretched molecular channels can also accelerate the transport of Li *** combined effects enable a high Coulombic efficiency of 97.0%for 250 cycles in lithium(Li)||copper(Cu)cell and a stable symmetric plating/stripping behavior over 2000 h at 3 mA cm^(-2)with ultrahigh Li utilization of 50%.Furthermore,the full cell coupled with PHL-Cu@Li anode and Li Fe PO_(4) cathode exhibits long-term cycle stability with high-capacity retention of 95.9%after 900 ***,the full cell paired with LiNi_(0.87)Co_(0.1)Mn_(0.03)O_(2)maintains a discharge capacity of 170.0 mAh g^(-1)with a capacity retention of 84.3%after 100 cycles even under harsh condition of ultralow N/P ratio of *** facile strategy will widen the potential application of LiNO_(3)in ester-based electrolyte for practical high-voltage LMBs.

关键词： Polymer ionic channel Li metal batteries Artificial protective layer Uniform Li deposition Electrochemical performances

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Facile Fabrication of Ag Nanocrystals Encapsulated in Nitrogen-doped Fibrous Carbon as an Efficient Catalyst for Lithium Oxygen Batteries

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Energy & Environmental Materials 2021年第2期4卷 239-245页

作者： Lili liu Tianyi Ma Weiwei Fang Yuqing liu Kostantin Konstantinov Jiazhao Wang hua-kun liu School of Energy and Institute for Advanced Materials Nanjing Tech UniversityJiangsu ProvinceNanjing 211816China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest BiomassCollege of Chemical EngineeringNanjing Forestry University(NFU)Nanjing 210037China State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China Intelligent Polymer Research Institute University of WollongongWollongong NSW 2522Australia Institute for Superconducting and Electronic Materials University of WollongongWollongong NSW 2522Australia

A facile synthesis of Ag nanocrystals encapsulated in nitrogen-doped carbon fiber(NCF)is proposed,based on the simultaneous reaction between pyrrole and Ag^(+)ions in an aqueous solvent followed by a heat *** as-prepared Ag/NCF demonstrated superior catalytic behavior toward ORR and *** improved cycling stability,a much lower discharge/charge gap of 0.89 V(vs Li/Li^(+))compared with 1.38 V for NCF cathode with a fixed capacity of 500 m Ah g^(-1)was obtained in lithium oxygen *** introduction of Ag crystals into NCF facilitates the oxygen reduction reaction/oxygen evolution reaction kinetics.X-ray diffraction analysis coupled with Raman spectroscopy confirmed that Ag/NCF cathode could reversibly catalyze Li_(2)O_(2)formation and *** NCF matrix offers a conductive network to realize rapid mass transfer and the encapsulated Ag nanocrystals supplied effective catalytic active *** combined action between both contributes to the superior electrocatalytic performance.

关键词： Ag nanocrystals Li_(2)O_(2) Li–O_(2)batteries N-carbon fiber overpotential

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Functional membrane separators for next-generation high-energy rechargeable batteries

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National Science Review 2017年第6期4卷 917-933页

作者： Yuede Pan Shulei Chou hua kun liu Shi Xue Dou Institute for Superconducting and Electronic Materials University of Wollongong Zhuhai Coslight Battery Co. Ltd

The membrane separator is a key component in a liquid-electrolyte battery for electrically separating the cathode and the anode, meanwhile ensuring ionic transport between them. Besides these basic requirements, endowing the separator with specific beneficial functions is now being paid great attention because it provides an important alternative approach for the development of batteries, particularly next-generation high-energy rechargeable batteries. Herein, functional separators are overviewed based on four key criteria of next-generation high-energy rechargeable batteries: stable,safe, smart and sustainable(4 S). That is, the applied membrane materials and the corresponding functioning mechanisms of the 4 S separators are reviewed. Functional separators with selective permeability have been applied to retard unwanted migration of the specific species(e.g. polysulfide anions in Li-S batteries) from one electrode to the other in order to achieve stable cycling operation. The covered battery types are Li-S, room-temperature Na-S, Li-organic, organic redox-flow(RF) and Li-air batteries. Safe, smart and sustainable separators are then described in sequence following the first criterion of stable cycling. In the final section, key challenges and potential opportunities in the development of 4 S separators are discussed.

关键词： functional 4S separators stable safe smart sustainable

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Ultra-light and flexible pencil-trace anode for high performance potassium-ion and lithium-ion batteries

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Green Energy & Environment 2017年第3期2卷 278-284页

作者： Zhixin Tai Yajie liu Qing Zhang Tengfei Zhou Zaiping Guo hua kun liu Shi Xue Dou Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Innovation Campus School of Mechanical Materials and Mechatronics Engineering University of Wollongong

Engineering design of battery configurations and new battery system development are alternative approaches to achieve high performance batteries. A novel flexible and ultra-light graphite anode is fabricated by simple friction drawing on filter paper with a commercial 8 B *** with the traditional anode using copper foil as current collector, this innovative current-collector-free design presents capacity improvement of over 200% by reducing the inert weight of the electrode. The as-prepared pencil-trace electrode exhibits excellent rate performance in potassium-ion batteries(KIBs), significantly better than in lithium-ion batteries(LIBs), with capacity retention of 66% for the KIB vs. 28% for the LIB from 0.1 to 0.5 A g^(-1). It also shows a high reversible capacity of ～230 mAh g^(-1) at 0.2 A g^(-1), 75% capacity retention over350 cycles at 0.4 A g^(-1)and the highest rate performance(based on the total electrode weight) among graphite electrodes for K+ storage reported so far.

关键词： Current-collector-free Flexible pencil-trace electrode Potassium-ion battery Lithium-ion battery Layer-by-layer interconnected architecture

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Boron doping-induced interconnected assembly approach for mesoporous silicon oxycarbide architecture

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National Science Review 2021年第6期8卷 169-179页

作者： Guanjia Zhu Rui Guo Wei Luo hua kun liu Wan Jiang Shi Xue Dou Jianping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua University Institute for Superconducting & Electronic Materials Australian Institute of Innovative MaterialsUniversity of Wollongong

Despite desirable progress in various assembly tactics, the main drawback associated with current assemblies is the weak interparticle connections limited by their assembling protocols. Herein, we report a novel boron doping-induced interconnection-assembly approach for fabricating an unprecedented assembly of mesoporous silicon oxycarbide nanospheres, which are derived from periodic mesoporous organosilicas. The as-prepared architecture is composed of interconnected, strongly coupled nanospheres with coarse surfaces. Significantly, through delicate analysis of the as-formed boron doped species, a novel melt-etching and nucleation-growth mechanism is proposed, which offers a new horizon for the developing interconnected assembling technique. Furthermore, such unique strategy shows precise controllability and versatility, endowing the architecture with tunable interconnection size, surface roughness and switchable primary nanoparticles. Impressively, this interconnected assembly along with tunable surface roughness enables intrinsically dual(both structural and interfacial) stable characteristics, achieving extraordinary long-term cycle life when used as a lithium-ion battery anode.

关键词： mesoporous materials boron doping interconnected assembly energy storage

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Effects of carbon on electrochemical performance of red phosphorus(P) and carbon composite as anode for sodium ion batteries

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Journal of Materials Science & Technology 2021年第9期68卷 140-146页

作者： Zhi-Jia Zhang Wei-Jie Li Shu-Lei Chou Chao Han hua-kun liu Shi-Xue Dou State Key Laboratory of Separation Membrane and Membrane Processes.Tianjin Municipal Key Laboratory of Advanced Fibers and Energy Storage School of Materials Science and EngineeringTiangong UniversityTianjin 300387China Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW2522Australia School of Civil and Environmental Engineering Faculty of Engineering and Information TechnologyUniversity of Technology Sydney.SydneyNSW2007Australia

Red phosphorus/graphite(P/G) and red phosphorus/carbon nanotube(P/CNT) composites were prepared by ball milling red phosphorus with CNTs and graphite, respectively. The electrochemical results show superior electrochemical performances of the P/G and P/CNT composites compared with that of the reference sample milled with Super-P carbon. After 70 cycles, the P/G and P/CNT composites remained771.6 and 431.7 mA h g^(-1), with 68 % and 50 % capacity retention, respectively. With increasing the milling time(20 h), CNTs were cut into short pieces and then broken into carbon rings and sheets which were well mixed with red phosphorus. The morphology of the P/CNT composite can buffer the large volume changes from alloying and de-alloying during cycling, resulting in the enhanced cycling stability.

关键词： Carbon coating Red phosphorus Anode materials Sodium ion batteries

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SnSb@carbon nanocable anchored on graphene sheets for sodium ion batteries

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Nano Research 2014年第10期7卷 1466-1476页

作者： Li Li Kuok Hau Seng Dan Li Yongyao Xia hua kun liu Zaiping Guo Institute for Superconducting and Electronic Materials University of Wollongong North Wollongong NSW 2500 Australia Department of Chemistry Institute of New Energy Fudan University Shanghai 200438 China School of Mechanical Materials and Mechatronics Engineering University of Wollongong Wollongong NSW 2522 Australia

The development of materials with unique nanostructures is an effective strategy for the improvement of sodium storage in sodium ion batteries to achieve stable cycling performance and good rate capability. In this work, SnSb- core/carbon-shell nanocables directly anchored on graphene sheets （GS） were synthesized by the hydrothermal technique and chemical vapor deposition. The simultaneous carbon coating and the encapsulation of SnSb alloy is effective for alleviating the volume-change problem in sodium ion batteries. After optimizing the electrolyte for SnSb in the sodium ion batteries, the optimized coaxial SnSb/carbon nanocable/GS （SnSb/CNT@GS） nanostructure demonstrated stable cycling capability and rate performance in 1 M NaClO4 with propylene carbonate （PC）＋ 5% fluoroethylene carbonate （FEC）. The SnSb/CNT@GS electrode can retain a capacity of 360 mAh/g for up to 100 cycles, which is 71% of the theoretical capacity. This is higher than in the other three electrolytes tested （1 M NaClO4 in PC, 1 M NaC104 in PC/FEC （1：1 v/v） and 1 M NaPF6 ＋ PC）, and higher than that of the sample without the addition of graphene. The good electrochemical performance can be attributed to the efficient buffering provided by the outer carbon nanocable layer and the graphene inhibiting the agglomeration of SnSb particles, as well as its high conductivity.

关键词： SnSb grapheme coaxial structure sodium ion batteries

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Effect of Sn substitution for Co on microstructure and electrochemical performance of AB_5 type La_(0.7)Mg_(0.3)Al_(0.3)Mn_(0.4)Co_(0.5-x)Sn_xNi_(3.8)(x=0-0.5) alloys

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Transactions of Nonferrous Metals Society of China 2015年第2期25卷 520-526页

作者： Julio Cesar Serafim CASINI Zai-ping GUO hua kun liu Eliner Affonso FERREIRA Rubens Nunes FARIA Hidetoshi TAKIISHI Institute for Semiconducting and Electronic Materials University of Wollongong Materials Science and Technology Center Nuclear and Energy Research InstituteUniversity of Sao Paulo

The effects of substitution of Sn for Co on the microstructure, hydrogen storage and electrochemical discharge capacity of La0.7Mg0.3Al0.3Mn0.4Co0.5-xSnxNi3.8 （x=0, 0.1, 0.2, 0.3 and 0.5） alloys were investigated using X-ray diffraction （XRD）, pressure composition isotherm （PCT） and electrochemical discharge cycle. XRD, scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS） tests showed that all of alloys are mainly composed of LaNi5 and MgNi2 phases, but when increasing the content of Sn in alloys, the LaNiSn phase appears and microstructure is refined. The PCT showed that increasing substitution of Sn for Co results in decrease of the maximum hydrogen storage capacity from 1.48% （x=0） to 0.85% （x=0.5）. The electrochemical tests indicated that the maximum discharge capacity decreases from 337.1 mA-h/g （x=0） to 239.8 mA.h/g （x=0.5）; however, the discharge capacity retention at the 100th cycle increases from 70.2% （x=0） to 78.0% （x=0.5）.

关键词： hydrogen storage alloys microstructure Ni-MH batteries Sn Co substitution

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An in-situ generated Bi-based sodiophilic substrate with high structural stability for high-performance sodium metal batteries

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Journal of Energy Chemistry 2022年第8期31卷 595-603,I0016页

作者： Lulu Li Ming Zhu Guanyao Wang Fangfang Yu Liaoyong Wen hua-kun liu Shi-Xue Dou Chao Wu School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNSW2522Australia Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024ZhejiangChina

Sodium(Na)metal anode exhibits a potential candidate in next-generation rechargeable batteries owing to its advantages of high earth abundance and low ***,the practical development of sodium metal batteries is inherently plagued by challenges such as the side reactions and the growth of Na *** we report a highly stable Bi-based“sodiophilic”substrate to stabilize Na anode,which is created by in-situ electrochemical reactions of 3D hierarchical porous Bi_(2)MoO_(6)(BMO)*** is initially transformed into the Bi“nanoseeds”embedded in the Na-Mo-O ***,the Bi nanoseeds working as preferential nucleation sites through the formation of BiNa alloy enable the non-dendritic Na *** asymmetric cells based on such BMO-based substrate can deliver a long-term cycling for 600 cycles at a large capacity of 4 m Ah cm^(-2) and for 800 cycles at a high current density of 10 m A cm^(-2).Even at a high depth of discharge(66.67%),the Na-predeposited BMO(Na@BMO)electrodes can cycle for more than 1600 *** limited Na@BMO anodes coupled with the Na_(3)V_(2)(PO_(4))_(3) cathodes(N/P ratio of 3)in full cells also show excellent electrochemical performance with a capacity retention of about 97.4%after 1100 cycles at 2 C.

关键词： Sodium metal anode Bi_(2)MoO_(6)microspheres Sodiophilic substrate Conversion and alloying reaction Uniform sodium deposition

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Design strategies of performance-enhanced Se cathodes for Li-Se batteries and beyond

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Journal of Energy Chemistry 2023年第1期76卷 528-546,I0013页

作者： Weiling Qiu Xiang Long huang Ye Wang Chi Feng Haining Ji hua kun liu Shi Xue Dou Zhiming Wang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongNSW 2500Australia School of Materials and Energy.University of Electronic Science and Technology of China Chengdu 610054SichuanChina Institute for Advanced Study Chengdu UniversityChengdu 610106SichuanChina Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghai 200093China

Lithium-selenium(Li-Se)batteries are deemed as an emerging high energy density electrochemical energy storage system owing to their high specific capacity and volume *** to their practicality,a series of critical challenges from the Se cathode side need to be overcome including low reactivity of bulk Se,shuttle effect of intermediates,sluggish redox kinetics of polyselenides,and volume change *** this review,recent progress on design strategies of functional Se cathodes are comprehensively summarized and *** the significance and key challenges,various efficient functionalized strategies for Se cathodes are presented,encompassing covalent bonding,nanostructure construction,heteroatom doping,component hybridization,and solid solution ***,the universality of these functional strategies are successfully extended into Na-Se batteries,K-Se batteries,and Mg-Se *** last,a brief summary is made and some perspectives are offered with the goal of guiding future research advances and further exploration of these strategies.

关键词： Metal-selenium batteries Se cathodes Carbons Nanostructure Materials design

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