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A Li_(3)P nanoparticle dispersion strengthened ultrathin Li metal electrode for high energy density rechargeable batteries

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Nano Research 2024年第5期17卷 4031-4038页

作者： Lin Fu Xiancheng Wang Bao Zhang Zihe Chen Yuanjian Li yongming sun Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology School of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)Singapore 138634Singapore

Achievement of lithium(Li)metal anode with thin thickness(e.g.,≤30µm)is highly desirable for rechargeable high energy density ***,the fabrication and application of such thin Li metal foil electrode remain challenging due to the poor mechanical processibility and inferior electrochemical performance of metallic ***,mechanico-chemical synthesis of robust ultrathin Li/Li_(3)P(LLP)composite foils(~15µm)is demonstrated by employing repeated mechanical rolling/stacking operations using red P and metallic Li as raw *** in-situ formed Li+-conductive Li_(3)P nanoparticles in metallic Li matrix and their tight bonding strengthen the mechanical durability and enable the successful fabrication of free-standing ultrathin Li metal composite ***,it also reduces the electrochemical Li nucleation barrier and homogenizes Li plating/stripping *** matching to high-voltage LiCoO_(2),the full cell with a low negative/positive(N/P)capacity ratio of~1.5 offers a high energy density of~522 W·h·kg^(-1) at 0.5 C based on the mass of cathode and *** into account its facile manufacturing,potentially low cost,and good electrochemical performance,we believe that such an ultrathin composite Li metal foil design with nanoparticle-dispersion-strengthened mechanism may boost the development of high energy density Li metal batteries.

关键词： lithium metal anode high energy density battery mechanico-chemical synthesis ultrathin Li/Li_(3)P composite foil low negative/positive capacity ratio

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Optimization of the methane production in batch anaerobic digestion of maize straw by adjustment of total solid and substrate-to-inoculum ratio based on kinetics

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 225-231页

作者： Feng Zhen Tao Xing Lianhua Li yongming sun Hongqiong Zhang Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640China College of Engineering Northeast Agricultural UniversityHarbin 150030China

Anaerobic digestion(AD)operating under conditions of organic overload stress typically exacerbates the potential for process instability,thereby resulting in significant economic and ecological *** this investigation,an augmented substrate-to-inoculum ratio(S/I)along with varying total solid content(TS)levels was employed to replicate diverse organic loadings,utilizing maize straw and cattle *** findings reveal that a moderate augmentation in S/I and TS proves advantageous in augmenting methane yield,while an excessive substrate loading diminishes methane yield,hampers the kinetics of methane production,and even induces severe process *** study also displayed the variation of the model parameters for the first-order model,the modified Gompertze model,and the transfer function *** the modified Gompertze model and transfer function model exhibited the same environmental stress ***,both the increase in particulate content and the increase in S/I had a substantial effect on the substrate conversion rate to *** analysis demonstrates the dominant influence of Firmicutes and Methanosarcina under different organic loading *** both a kinetic and a microbiological point of view,this work provides novel insights into the fundamental processes that regulate anaerobic digestion(AD)under varying loading ***,it has significant implications for improving the operating efficiency of AD,which is a significant benefit.

关键词： maize straw dry anaerobic digestion methane production microbial characteristics kinetic model

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Suppressing dendritic metallic Li formation on graphite anode under battery fast charging

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Journal of Energy Chemistry 2024年第4期91卷 484-500页

作者： Shiyu Liu Baoqi Gu Zihe Chen Renming Zhan Xiancheng Wang Ruikang Feng yongming sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina

Lithium-ion batteries(LIBs)with fast-charging capability are essential for enhancing consumer experience and accelerating the global market adoption of electric ***,achieving fast-charging capability without compromising energy density,cycling lifespan,and safety of LIBs remains a significant challenge due to the formation of dendritic Li metal on graphite anode under fast charging *** view of this,the fundamentals for the dendritic metallic Li formation and the strategies for suppressing metallic Li plating based on analyzing the entire Li^(+)transport pathway at the anode including electrolyte,pore structure of electrode,and surface and bulk of materials are summarized and discussed in this ***,we highlight the importance of designing thick electrodes with fast Li^(+)transport kinetics and comprehensively understanding the interaction between solid electrolyte interphase(SEI)and Li^(+)migration in order to avoid the formation of dendritic Li metal in practical fast-charging ***,the regulation of Li metal plating with plane morphology,instead of dendritic structure,on the surface of graphite electrode under fast-charging condition is analyzed as a future direction to achieve higher energy density of batteries without safety concerns.

关键词： Safety Fast-charging lithium-ion batteries Dendritic metallic lithium Li^(+) transport

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Catalytic anode surface enabling in situ polymerization of gel polymer electrolyte for stable Li metal batteries

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Nano Research 2024年第6期17卷 5216-5223页

作者： Guocheng Li Kang Liang Yuanjian Li Xiangrui Duan Lin Fu Zhao Cai Zhaofu Zhang Jiangnan Dai yongming sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China The Institute of Technological Sciences Wuhan UniversityWuhan 430074China Faculty of Materials Science and Chemistry China University of Geoscience(Wuhan)Wuhan 430074China

Employing quasi-solid-state gel polymer electrolyte(GPE)instead of the liquid counterpart has been regarded as a promising strategy for improving the electrochemical performance of Li metal ***,the poor and uneven interfacial contact between Li metal anode and GPE could cause large interfacial resistance and electrochemical Li stripping/plating inhomogeneity,deteriorating the electrochemical ***,we proposed that the functional component of composite anode could work as the catalyst to promote the in situ polymerization reaction,and we experimentally realized the integration of polymerized-dioxolane electrolyte and Li/Li_(22)Sn_(5)/LiF composite electrode with low interfacial resistance and good stability by in situ catalyzation ***,the reaction kinetics and stability of metallic Li anode were significantly *** a demonstration,symmetric cell using such a GPE-Li/Li_(22)Sn_(5)/LiF integration achieved stable cycling beyond 250 cycles with small potential hysteresis of 25 mV at 1 mA·cm^(−2)and 1 mAh·cm^(−2),far outperforming the counterpart regular GPE on pure *** with LiNi0.5Co0.3Mn0.2O2,the full cell with the GPE-Li/Li_(22)Sn_(5)/LiF integration maintained 85.7%of the original capacity after 100 cycles at 0.5 C(1 C=200 mA·g^(−1)).Our research provides a promising strategy for reducing the resistance between GPE and Li metal anode,and realizes Li metal batteries with enhance electrochemical performance.

关键词： catalyzation polymerization interface resistance interfacial stability Li metal batteries electrochemical performance

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果蔬垃圾重复批次发酵协同制备乳酸和短链脂肪酸

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农业工程学报 2024年第12期40卷 255-263页

作者：刘会亮伍迪王智甄峰李颖孔晓英邢涛孙永明中国科学院广州能源研究所广州510640 广东省新能源和可再生能源开发与利用重点实验室广州510640 中国科学院大学北京100049 中国科学技术大学合肥230026 中国科学院重庆绿色智能技术研究院重庆400714

利用果蔬垃圾厌氧合成中链脂肪酸(medium-chain fatty acids,MCFAs)等化学品是厌氧技术高值化的重要方向。中链脂肪酸合成通常需要以乳酸/乙醇(电子供体)和短链脂肪酸(电子受体)为碳源进行碳链延长反应。因此,利用有机废弃物连续、稳定... 详细信息

利用果蔬垃圾厌氧合成中链脂肪酸(medium-chain fatty acids,MCFAs)等化学品是厌氧技术高值化的重要方向。中链脂肪酸合成通常需要以乳酸/乙醇(电子供体)和短链脂肪酸(电子受体)为碳源进行碳链延长反应。因此,利用有机废弃物连续、稳定地协同制备乳酸和短链脂肪酸是中链脂肪酸合成的关键步骤。该研究考察了果蔬垃圾重复批次发酵协同制备乳酸和短链脂肪酸(short-chain fatty acids,SCFAs)的可行性,研究了不同置换率和进料浓度对果蔬垃圾重复批次发酵产酸特性的影响。结果表明,调控重复批次发酵的置换率和进料浓度是提高生产率、改善乳酸/SCFAs比例的有效方法。综合考虑酸化产物的生产率、乳酸/SCFAs和碳源浓度,在70%置换率和8%进料总固体TS(total solid)浓度条件下获得的酸化产物相对更有利于MCFAs的合成。此时,酸化产物生产率达到(5.25±0.25)g/(L·d),乳酸/SCFAs的碳摩尔比例达到5±0.3,碳源浓度达到(985±29)mmol/L。微生物群落分析显示,乳酸菌,如Lactobacillus和Enterococcus作为优势菌可通过异型乳酸发酵协同制备乳酸和SCFAs。研究结果可为果蔬垃圾的高值化利用提供参考。

关键词：垃圾乳酸短链脂肪酸重复批次发酵中链脂肪酸微生物群落

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Anode corrosion in aqueous Zn metal batteries

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eScience 2023年第1期3卷 2-13页

作者： Zhao Cai Jindi Wang yongming sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Faculty of Materials Science and Chemistry China University of Geosciences(Wuhan)Wuhan 430074China Institute of New Energy on Chemical Storage and Power Sources College of Applied Chemistry and Environmental EngineeringYancheng Teachers UniversityYancheng 224000China

Given their low cost and intrinsic safety,aqueous Zn metal batteries(AZMBs)are drawing increasing attention in the field of smart grids and large-scale energy ***,the Zn metal anode in aqueous electrolyte suffers from a critical issue,corrosion,which must be fully addressed before the practical implementation of *** this perspective,the mechanisms of aqueous Zn metal anode corrosion in both alkaline and neutral electrolytes are compared and *** methods for studying the corrosion processes and the strategies for Zn corrosion protection in AZMBs are also ***,some expectations about potential research directions for making corrosion-resistant AZMBs a commercial reality are provided.

关键词： Aqueous batteries Zn metal anode Chemical oxidation Electrochemical hydrogen evolution Corrosion mechanism Surface protection

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数字赋能高质量公共体育服务供给的现实审视、行动逻辑与实现方略

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天津体育学院学报 2024年第4期39卷 435-441页

作者：季彦霞吕万刚伍艺昭何文革孙永明河北体育学院河北石家庄050041 武汉体育学院湖北武汉430079

实现公共体育服务高质量发展并促进其高质量供给,是建设更高水平的全民健身公共服务体系的题中要义。运用文献资料法、逻辑分析法,以数字赋能为手段,以高质量发展为目标,探讨数字赋能高质量公共体育服务供给的发展现实、行动逻辑与实现... 详细信息

实现公共体育服务高质量发展并促进其高质量供给,是建设更高水平的全民健身公共服务体系的题中要义。运用文献资料法、逻辑分析法,以数字赋能为手段,以高质量发展为目标,探讨数字赋能高质量公共体育服务供给的发展现实、行动逻辑与实现方略。认为我国公共体育服务供给目前存在创新要素激活不够、供给内容协调不足、绿色发展成效不高、服务效度提升不显、供需结构存在偏差等发展瓶颈。数字赋能高质量公共体育服务供给要遵循构建以服务质量为中心的赋能体系、创新以数字技术为载体的赋能工具、强化以人民需求为中心的赋能价值的行动逻辑。要通过全链条增效、整体性协调、绿色化发展、多维度开放、多元化共享打造高质量的公共体育服务;通过数字化供给手段创新、数字化供给信息创新、数字化供给机制创新、数字化供给模式创新,实现公共体育服务的高质量供给。

关键词：数字赋能高质量发展公共体育服务高质量供给新发展理念

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In Situ Formation of LiF-Rich Carbon Interphase on Silicon Particles for Cycle-Stable Battery Anodes

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Transactions of Tianjin University 2023年第2期29卷 101-109页

作者： Yang Ni Shuibin Tu Renmin Zhan Zhao Cai Xiaohong Wang yongming sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Faculty of Materials Science and Chemistry China University of Geosciences(Wuhan)Wuhan 430074China

Silicon(Si)is a potential high-capacity anode material for the next-generation lithium-ion battery with high energy ***,Si anodes suff er from severe interfacial chemistry issues,such as side reactions at the electrode/electrolyte interface,leading to poor electrochemical cycling ***,we demonstrate the fabrication of a conformal fl uorine-containing carbon(FC)layer on Si particles(Si-FC)and its in situ electrochemical conversion into a LiF-rich carbon layer above 1.5 V(***^(+)/Li).The as-formed LiF-rich carbon layer not only isolates the active Si and electrolytes,leading to the suppression of side reactions,but also induces the formation of a robust solid-electrolyte interface(SEI),leading to the stable interfacial chemistry of as-designed Si-FC *** Si-FC electrode has a high initial Coulombic effi ciency(CE)of 84.8%and a high reversible capacity of 1450 mAh/g at 0.4 C(1000 mA/g)for 300 *** addition,a hybrid electrode consisting of 85 wt%graphite and 15 wt%Si-FC,and mass 2.3 mg/cm^(2) loading delivers a high areal capacity of 2.0 mAh/cm^(2) and a high-capacity retention of 93.2%after 100 cycles,showing the prospects for practical use.

关键词： Lithium-ion batteries Silicon anode LiF-rich carbon interphase Capacity Cycling stability

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基于预探索的动态自适应3DVFH+无人机避障算法

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电子设计工程 2024年第4期32卷 1-7页

作者：何晨阳王耀力常青孙永明太原理工大学信息与计算机学院山西太原030024 山西省林业与草原科学研究院山西太原030024

为解决无人机在未知复杂环境下的自主避障规划问题,同时考虑到旋翼无人机平台硬件资源稀缺的问题,提出了一种基于预探索的动态自适应3DVFH+算法。根据无人机飞行进度以及障碍物信息,动态调整代价函数的自适应权重因子;通过对无人机视野... 详细信息

为解决无人机在未知复杂环境下的自主避障规划问题,同时考虑到旋翼无人机平台硬件资源稀缺的问题,提出了一种基于预探索的动态自适应3DVFH+算法。根据无人机飞行进度以及障碍物信息,动态调整代价函数的自适应权重因子;通过对无人机视野范围的预探索,构建了搜索树,并对障碍物及无人机模型进行了建模研究,同步实现了无人机在复杂环境中的可视化分析。结果表明,动态自适应代价函数消除了3DVFH+算法的死区现象;预探索机制解决了算法的局部最优解问题,规划航线缩短37.15%,所需时间减少24.48%。同时搭建了复杂度较高的森林障碍物进行验证分析,相较于使用八叉树框架建图的3DVFH+算法执行相同避障规划任务时节省内存可达25.26%。

关键词：避障规划无人机 3DVFH+ 自适应代价函数预探索

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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 *** 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 *** 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 *** the above advantages,uniform Li plating with dense and planar structure is realized for the LKNO *** 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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