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Research Progress in Lithium-Excess Disordered Rock-Salt Oxides Cathode

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Energy & Environmental Materials 2022年第4期5卷 1139-1154页

作者： Manxi Wang xiaochuan chen Hurong Yao Ganggang Lin Jinhyuk Lee Yuming chen Qinghua chen College of Environmental Science and Engineering and College of Physics and Energy Fujian Normal UniversityFuzhou 350000China School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China State Grid Fujian EHV Company Fuzhou 350000China Department of Mining and Materials Engineering McGill UniversityMontrealQC H3A 0C5Canada

The increasing demand for new energy sources has promoted the improvement of the energy storage capacity of lithium-ion batteries(LIBs)that urged the development of higher energy density cathode *** enhancement of the classical cathode in the last 30 years has reached a bottleneck,and then the discovery of the lithium-excess disordered materials has greatly expanded the research space of the cathode *** with the conventional layered oxides,the lithium-excess disordered rock-salt oxides(LEDRXs)with a more stable structure has higher extractable Li^(+)content,even though the inactive high-valent transition metals(TMs)were needed to compensate for the excess Li,which would reduce the total TM redox *** addition,oxygen redox provides additional electron capacity for the materials,which also causes O loss and results in the subsequent poor cycle ***,a series of studies about LEDRXs and their targeted modification measures are summarized,including the prospect of the materials,in order to provide ideas for the design of highperformance ***,the new discoveries and outlook on future research directions of LEDRX cathode materials for LIBs with higher energy density are given.

关键词： disordered rock-salt oxides lithium-excess lithium-ion batteries

A Charge Equalizer in Accordion-MXene-Modified Layer Leading to Spherical Lithium Deposition

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Energy & Environmental Materials 2023年第6期6卷 335-344页

作者： Yangmingyue Zhao Libo Li Da Zhou Yuhang Shan xiaochuan chen Wenjun Cui School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China

Lithium-ion batteries with polymer electrolytes(PEs)are promising candidates for high safety performance ***,conventional PEs suffer from poor compatibility and high impedance of electrolyte-electrode ***,we present a method of the interfacial modification for PEs to inhibit lithium dendrites based on the solution to the interfacial *** strategy is to improve the interfacial properties and inhibit the dendrite generation by coating a modified layer on PEs of the anode side with acetylene black(AB)and *** mixed conductive layer(MCL)can promote the generation of Li3N and LiF with a uniform arrangement of electrons to form a dense solid electrolyte interphase layer and the even lithium-ion deposition for improving the performance and stability of the battery during *** adding the MCL,the discharge capacity of solid lithium-ion batteries(SLIBs)with lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)/organic modified montmorillonite(OMMT)/soybean isolate protein(SPI)/poly(vinylidene fluoride)(PVDF)(LOSP)PE from 74.2 mAh g^(-1)up to 111.1 mAh g^(-1)(AB-LiTFSI/OMMT/SPI/PVDF(AB-LOSP))and 111.6 mAh g^(-1)(AB/MXene-LiTFSI/OMMT/SPI/PVDF(AB/MXene-LOSP)).The polarization voltage dropped by 0.06 and 0.12 V,*** work represents a milestone in the dendrite-free SLIBs with good performances.

关键词： dendrite-free interface modification lithium-ion batteries polymer electrolyte SEI film

Notes in accordions-organized MXene equipped with CeO_(2) for synergistically adsorbing and catalyzing polysulfides for high-performance lithium-sulfur batteries

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Journal of Energy Chemistry 2022年第7期31卷 502-510,I0013页

作者： xiaochuan chen Libo Li Yuhang Shan Da Zhou Wenjun Cui Yangmingyue Zhao School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040HeilongjiangChina

Limited by the shuttle effect, the application of lithium-sulfur batteries is not impressive. As an organ layered two-dimensional(2D) material, MXene has a great electrical conductivity and high specific surface area. Meanwhile, the introduction of metal oxides can restrain the shuttle effect. Hence, this paper prepared CeO_(2)/MXene as a cathode material of Li-S batteries. Ce and Ti can chemically adsorb S, and the interlayer structure of MXene can limit S while the interlayer space can alleviate volume *** discharge capacity at 0.5 C is as high as 1051.1 m Ah g^(-1), and 921.9 m Ah g^(-1) after 200 cycles. The average coulombic efficiency is 97.75%. The organized MXene with CeO_(2) like notes in accordions are new efficient materials for lithium-sulfur batteries.

关键词： Cooperative effects MXene CeO_(2) Kinetics Lithium-sulfur batteries

Electrospun carbon nanofibers for lithium metal anodes:Progress and perspectives

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Chinese Chemical Letters 2022年第1期33卷 141-152页

作者： Hongyang chen Manxian Li Chuanping Li Xuan Li Yaling Wu xiaochuan chen Junxiong Wu Xiaoyan Li Yuming chen College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350007China College of Life Science Fujian Normal UniversityFuzhou 350007China School of Chemistry Sun Yat-Sen UniversityGuangzhou 510275China State Key Laboratory of Structural Chemistry Fuzhou 350000China

Li metal anodes(LMAs)has attracted extensive research interest because of its extremely high theoretical capacity(3860 m Ah/g)at low redox potential(-3.04 V *** hydrogen electrode).However,the extremely high chemical reactivity and the intrinsic“hostless”nature of LMAs bring about serious dendritic growth and dramatic volume change during the plating/strapping process,thus resulting in poor Coulombic efficiency,short lifespan,and severe safety *** various strategies,the construction of three-dimensional carbonaceous scaffolds for LMAs can substantially reduce the local current density,inhibit Li dendrite growth,and accommodate volume *** is a simple yet effective strategy to fabricate carbon nanofibers(CNFs),which have been regarded as promising skeletons for LMAs,owing to their large surface areas,good electrical conductivity,and high *** this Mini Review,we briefly introduce the fabrication of CNFs using electrospinning and the modification of *** highlight the recent advances in electrospun CNF skeletons for LMAs,including pure CNF and CNF-based composite ***,we discuss the remaining challenges of electrospun CNF scaffolds for LMAs and provide possible solutions to push forward the advancement in this field.

关键词： Electrospinning Lithium metal anodes Carbon nanofibers Lithiophilic hosts Three-dimensional skeletons

SnS_(2)nanoparticles embedded in sulfurized polyacrylonitrile composite fibers for high-performance potassium-ion batteries

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Interdisciplinary Materials 2024年第1期3卷 150-159页

作者： Ruiling Li Lijuan Tong Yitong Jiang Yaxin Wang Jing Long xiaochuan chen Junxiong Wu Xiaoyan Li Yuming chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianChina

Potassium-ion batteries(PIBs)have garnered significant attention as a promising alternative to commercial lithium-ion batteries(LIBs)due to abundant and cost-efficient potassium ***,the large size of potassium ions and the resulting sluggish reaction kinetics present major obstacles to the widespread use of ***,we present a simple method to ingeniously encapsulate SnS_(2)nanoparticles within sulfurized polyacrylonitrile(SPAN)fibers(SnS_(2)@SPAN)for serving as a high-performance PIB *** large interlayer spacing of SnS_(2)provides a fast transport channel for potassium ions during charge–discharge cycles,while the one-dimensional SPAN skeleton offers massive binding sites and shortens the diffusion path for potassium ions,facilitating faster reaction ***,the excellent ductility of SPAN can effectively accommodate the large volume changes that occur in SnS_(2)upon potassium-ion insertion,thereby enhancing the cyclic stability of SnS_(2).Benefiting from the above advantages,the SnS_(2)@SPAN composites exhibit impressive cyclability over 500 cycles at 4 A g−1,with a capacity retention rate close to 100%.This study provides an effective approach for stabilizing high-capacity PIB anode materials with large volume variations.

关键词： electrospinning encapsulation potassium‐ion batteries sulfurized polyacrylonitrile tin disulfide

Electrospun advanced nanomaterials for in situ transmission electron microscopy:Progress and perspectives

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InfoMat 2023年第12期5卷 1-27页

作者： Jingyue Zhao Zulin Li Shiwen Lv Manxi Wang Chuanping Li Xuan Li Hongyang chen Manxian Li xiaochuan chen Feifeng Wang Weiwei Fan Junxiong Wu Ziqiang Wang Xiaoyan Li Yuming chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianthe People's Republic of China Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhenthe People's Republic of China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujianthe People's Republic of China

Electrospun nanofibers(NFs)have shown excellent properties including high porosity,abundant active sites,controllable diameter,uniform and designable structure,high mechanical strength,and superior resistance to external destruction,which are ideal nanoreactors for in situ *** various techniques,in situ transmission electron microscopy(TEM)has enabled operando observation at the atomic level due to its high temporal and spatial resolution combined with excellent sensitivity,which is of great importance for rational materials design and performance *** this review,the basic knowledge of in situ TEM techniques and the advantages of electrospun nanoreactors for in situ TEM characterization are first *** recent development in electrospun nanoreactors for studying the physical properties,structural evolution,phase transition,and formation mechanisms of materials using in situ TEM is then *** electrochemical behaviors of carbon nanofibers(CNFs),metal/metal oxide NFs,and solidelectrolyte interphase for different rechargeable batteries are ***,challenges faced by electrospun nanoreactors for in situ TEM characterization are discussed and potential solutions are proposed to advance this field.

关键词： batteries electrospun advanced nanofibers in situ transmission electron microscopy nanoreactors

Nitrogen doping induced by intrinsic defects of recycled polyethylene terephthalate-derived carbon nanotubes

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SusMat 2023年第3期3卷 431-440页

作者： Chuanping Li Lijuan Tong Shuling Wang Qian Liu Yaxin Wang Xuan Li Manxi Wang Manxian Li xiaochuan chen Junxiong Wu Qinghua chen Yiu-Wing Mai Weiwei Fan Yuming chen Xiaoyan Li Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianChina Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing School of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandanHebeiChina Centre for Advanced Materials Technology(CAMT) School of AerospaceMechanical and Mechatronics Engineering J07The University of SydneySydneyNew South WalesAustralia Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

The indiscriminate utilization of nondegradable polyethylene terephthalate(PET)-based products has triggered serious environmental pollution that has to be resolved vigorously.A simple synthesis of N-doped carbon nanotubes from recycled PET(NCNTs_(r-PET))was developed by a nitric acid-assisted hydrothermal *** results and theoretical calculations show that the intrinsic defects in CNTs_(r-PET)would induce N-doping by NH_(3)generated from nitric acid during the hydrothermal process,thus producing the NCNTs_(r-PET).The life cycle assessment proves that the developed method for N-doped CNTs using r-PET as the carbon source is more environmentally friendly than the conventional chemical vapor deposition using acetylene as the carbon *** a typical application,the NCNTs_(r-PET)delivered an impressive sodium storage capacity with an ultralong *** work not only provides a new route to upcycling waste plastics into valuable carbonaceous materials in an ecofriendly manner,but also reveals a basic understanding of the N-doping mechanism in carbonaceous materials.

关键词： carbon nanotubes defect-induced N-doping life cycle assessment rechargeable batteries recycled PET

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木脂素类化合物的全合成研究

有机化学 2001年第11期21卷 1060-1064页

作者：潘鑫复陈小川兰州大学化学系，应用有机化学国家重点实验室，兰州730000 兰州大学化学系，应用有机化学国家重点实验室，兰

综述了本研究小组近几年在木脂素全合成研究中取得的新进展.主要包括三部分:通过β-酮酸酯偶联反应来合成去甲二氢愈创木酸及多种其它类型木脂素;通过氧化银偶联和DDQ合环首次合成黄酮木脂素(±)-Sinaiticin;通过Sharpless不对称双羟化... 详细信息

综述了本研究小组近几年在木脂素全合成研究中取得的新进展.主要包括三部分:通过β-酮酸酯偶联反应来合成去甲二氢愈创木酸及多种其它类型木脂素;通过氧化银偶联和DDQ合环首次合成黄酮木脂素(±)-Sinaiticin;通过Sharpless不对称双羟化为关键步骤首次手性合成1,4-苯并二氧六环类新木脂素.

关键词：木脂素黄酮木脂素去甲二氢愈创木酸苯并二氧六环全合成对映选择性药物合成天然产物新药开发

A Heterogeneous Quasi‑solid‑State Hybrid Electrolyte Constructed from Electrospun Nanofibers Enables Robust Electrode/Electrolyte Interfaces for Stable Lithium Metal Batteries

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Advanced Fiber Materials 2024年第3期6卷 727-738页

作者： Manxi Wang Shiwen Lv Manxian Li Xuan Li Chuanping Li Zulin Li xiaochuan chen Junxiong Wu Xiaoyan Li Yuming chen Qinghua chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhou 350000China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350000China

Quasi-solid-state electrolytes that possess high ionic conductivity,excellent interface stability,and low interfacial resistance,are required for practical solid-state ***,a heterogeneous quasi-solid-state hybrid electrolyte(QSHE)with a robust lithium-ion transport layer composed of Li_(1+x)Al_(x)Ti_(2−x)(PO_(4))_(3)(LATP)nanoparticles(NPs)at the anode/electrolyte interface was fabricated using electrospun nanofibers as a skeleton via a facile in situ polymerization *** QSHE exhibits a high ionic conductivity(0.98 mS cm^(−1)),a wide electrochemical window(4.76 V ***/Li^(+)),and favorable compatibility with lithium metal(maintaining stability over 2000 h in a symmetrical cell)at room *** coupled with a Li|LiFePO_(4)battery,the QSHE enables the battery to retain 95.4%of its capacity after 300 cycles at 2 ***,the atomic force microscopy verifies the high Young’s modulus of the LATP-dominated bottom layer,while numerical simulation validates the effective distribution of lithium ions at the interface facilitated by LATP NPs,hence contributing to dendrite-free lithium plating/stripping *** straightforward strategy could pave the way for the development of high-performance and interfacially stable lithium metal batteries.

关键词： In situ polymerization Quasi-solid-state electrolytes Interface compatibility Lithium dendrites