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Anti-aggregation growth and hierarchical porous carbon encapsulation enables the C@VO_(2) cathode with superior storage capability for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2022年第4期31卷 645-654页

作者： ming Yang Yanyi Wang Zhongwei Sun hongwei mi Shichang Sun Dingtao Ma Peixin Zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina College of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina Shenzhen Hello Tech Energy Co. Ltd.Shenzhen 518100GuangdongChina Guangdong Engineering Technology Research Center for Distributed and Intelligent Small Solar Energy Storage Shenzhen 518100GuangdongChina

Self-aggregation and sluggish transport kinetics of cathode materials would usually lead to the poor electrochemical performance for aqueous zinc-ion batteries(AZIBs).In this work,we report the construction of C@VO_(2) composite via anti-aggregation growth and hierarchical porous carbon *** of the morphology of composite and pore structure of carbon layer can be regulated by tuning the adding amount of *** acting as cathode applied for AZIBs,the C@VO_(2)-3:3 composite can deliver a high capacity of 281 m Ah g^(-1) at 0.2 A g^(-1).Moreover,such cathode also exhibits a remarkably rate capability and cyclic stability,which can release a specific capacity of 195 m Ah g^(-1) at 5 A g^(-1) with the capacity retention of 95.4%after 1000 *** that,the evolution including the crystal structure,valence state and transport kinetics upon cycling were also deeply *** conclusion,benefited from the synergistic effect of anti-aggregation morphology and hierarchical porous carbon encapsulation,the building of such C@VO_(2) composite can be highly expected to enhance the ion accessible site,boost the transport kinetics and thus performing a superior storage *** design concept can be applied for other kinds of electrode materials and accelerating the development of highperformance AZIBs.

关键词： Aqueous zinc-ion batteries Anti-aggregation Hierarchical porous carbon encapsulation C@VO_(2)composite Storage mechanism

3D Artificial Array Interface Engineering Enabling Dendrite-Free Stable Zn Metal Anode

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Nano-micro Letters 2023年第3期15卷 112-128页

作者： Jianbin Ruan Dingtao Ma Kefeng Ouyang Sicheng Shen ming Yang Yanyi Wang Jinlai Zhao hongwei mi Peixin Zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Institute of microscale Optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China College of of Materials Science and Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Center Shenzhen 518060People’s Republic of China

The ripple effect induced by uncontrollable Zn deposition is considered as the Achilles heel for developing high-performance aqueous Zn-ion *** this problem,this work reports a design concept of 3D artificial array interface engineering to achieve volume stress elimination,preferred orientation growth and dendrite-free stable Zn metal *** mechanism of MXene array interface on modulating the growth kinetics and deposition behavior of Zn atoms were firstly disclosed on the multi-scale level,including the in-situ optical microscopy and transient simulation at the mesoscopic scale,in-situ Raman spectroscopy and in-situ X-ray diffraction at the microscopic scale,as well as density functional theory calculation at the atomic *** indicated by the electrochemical performance tests,such engineered electrode exhibits the comprehensive enhancements not only in the resistance of corrosion and hydrogen evolution,but also the rate capability and cyclic ***-rate performance(20 mA cm^(-2))and durable cycle lifespan(1350 h at 0.5 mA cm^(-2),1500 h at 1 mA cm^(-2)and 800 h at 5 mA cm^(-2))can be ***,the improvement of rate capability(214.1 mAh g^(-1)obtained at 10 A g^(-1))and cyclic stability also can be demonstrated in the case of 3D MXene array@Zn/*** the previous 2D closed interface engineering,this research offers a unique 3D open array interface engineering to stabilize Zn metal anode,the controllable Zn deposition mechanism revealed is also expected to deepen the fundamental of rechargeable batteries including but not limited to aqueous Zn metal batteries.

关键词： Aqueous Zn-ion batteries Volume stress 3D artificial array interface Controllable deposition Zn metal anode

Pyrimidine donor induced built-in electric field between melon chains in crystalline carbon nitride to facilitate excitons dissociation

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Chinese Chemical Letters 2023年第3期34卷 546-552页

作者： Guoqiang Zhang Yangsen Xu Guoshuai Liu Yongliang Li Chuanxin He Xiangzhong Ren Peixin Zhang hongwei mi College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Centre Shenzhen University Shenzhen 518060China Research Centre for Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

The strong intrinsic Coulomb interactions of Frenkel excitons in crystalline carbon nitride(CCN) greatly limits their dissociation into electrons and holes, resulting in unsatisfactory charges separation and photocatalytic efficiency. Herein, we propose a strategy to facilitate excitons dissociation by molecular regulation induced built-in electric field(BIEF). The electron-rich pyrimidine-ring into CCN changes the charge density distribution over heptazine-rings to induce BIEF between melon chains. Such BIEF is sufficient to overcome the considerable exciton binding energy(EBE) and reduce it from 38.4 meV to 16.4 meV,increasing the excitons dissociation efficiency(EDE) from 21.5% to 51.9%. Our results establish a strategy to facilitate excitons dissociation through molecular regulation induced BIEF, targeting the intrinsic high EBE and low EDE of polymer photocatalysts.

关键词： Crystalline carbon nitride Exciton binding energy Built-in electric field Pyrimidine donor Excitons dissociation

A Multifunctional Anti-Proton Electrolyte for High-Rate and Super-Stable Aqueous Zn-Vanadium Oxide Battery

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Nano-micro Letters 2022年第9期14卷 272-289页

作者： Yangwu Chen Dingtao Ma Kefeng Ouyang ming Yang Sicheng Shen Yanyi Wang hongwei mi Lingna Sun Chuanxin He Peixin Zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Institute of microscale Optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China

Large volumetric expansion of cathode hosts and sluggish transport kinetics in the cathode–electrolyte interface,as well as dendrite growth and hydrogen evolution at Zn anode side are considered as the system problems that cause the electrochemical failure of aqueous Zn-vanadium oxide *** this work,a multifunctional anti-proton electrolyte was proposed to synchronously solve all those *** and experimental studies confirm that PEG 400 additive can regulate the Zn^(2+) solvation structure and inhibit the ionization of free water molecules of the ***,smaller lattice expansion of vanadium oxide hosts and less associated by-product formation can be realized by using such ***,such electrolyte is also beneficial to guide the uniform Zn deposition and suppress the side reaction of hydrogen *** to the integrated synergetic modifica-tion,a high-rate and ultrastable aqueous Zn-V_(2)O_(3)/C battery can be constructed,which can remain a specific capacity of 222.8 m Ah g^(-1)after 6000 cycles at 5 A g^(-1),and 121.8 m Ah g^(-1) even after 18,000 cycles at 20 A g^(-1),***“all-in-one”solution based on the electrolyte design provides a new strategy for developing high-performance aqueous Zn-ion battery.

关键词： Zn-vanadium oxide battery Multifunctional anti-proton electrolyte Integrated synergetic modification “All-in-one”solution

Residual fluoride self-activated effect enabling upgraded utilization of recycled graphite anode

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Journal of Energy Chemistry 2024年第6期93卷 24-31,I0002页

作者： Shuzhe Yang Qingqing Gao Yukun Li hongwei Cai Xiaodan Li Gaoxing Sun Shuxin Zhuang Yujin Tong Hao Luo mi Lu School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024FujianChina Faculty of Physics University of Duisburg-EssenDuisburg D-47057Germany

Recycling graphite anode from spent lithium-ion batteries(SLIBs)is regarded as a crucial approach to promoting sustainable energy storage ***,the recycled graphite(RG)generally presents degraded structure and ***,the residual fluoride self-activated effect is proposed for the upgraded utilization of *** and low-energy water immersion treatment not only widens the interlayer spacing,but also retains appropriate fluoride on the surface of *** analysis and experiments demonstrate that the residual fluoride can optimize Li~+migration and deposition kinetics,resulting in better Li~+intercalation/deintercalation in the interlayer and more stable Li metal plating/stripping on the surface of RG,As a result,the designed LFP||RG full cells achieve ultrahigh reversibility(~100%Coulombic efficiency),high capacity retention(67%after 200 cycles,0.85 N/P ratio),and commendable adaptability(stable cycling without short-circuiting,0.15 N/P ratio).The energy density is improved from 334 Wh kg^(-1)of 1.1 N/P ratio to 367 Wh kg^(-1)of 0.85 N/P ratio(total mass based on cathode and anode).The exploration of RG by residual fluoride self-activated effect achieves upgraded utilization beyond fresh commercial graphite and highlights a new strategy for efficient reuse of SLIBs.

关键词： Spent lithium-ion batteries Recycled graphite anode Fluoride Self-activated effect Upgraded utilization

High formability Mg-Zn-Gd wire facilitates ACL reconstruction via its swift degradation to accelerate intra-tunnel endochondral ossification

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Journal of Magnesium and Alloys 2024年第1期12卷 295-315页

作者： Xuan He Ye Li hongwei miao Jiankun Xu michael Tim-yun Ong Chenmin Wang Lizhen Zheng Jiali Wang Le Huang Haiyue Zu Zhi Yao Jie mi Bingyang Dai Xu Li Patrick Shu-hang Yung Guangyin Yuan Ling Qin Musculoskeletal Research Laboratory of Department of Orthopaedics&Traumatology and Innovative Orthopaedic Biomaterial and Drug Translational Research Laboratory of Li Ka Shing Institute of Health Sciences The Chinese University of Hong KongHong KongChina National Engineering Research Center of Light Alloy Net Forming School of Materials Science&EngineeringShanghai Jiao Tong UniversityShanghaiChina Department of Orthopaedics and Traumatology Li Ka Shing Faculty of MedicineThe University of Hong KongHong KongChina Orthopaedic Department Peking University Third HospitalBeijingChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong KongChina

After reconstructing the anterior cruciate ligament(ACL),unsatisfactory bone tendon interface healing may often induce tunnel enlargement at the early healing *** good biological features and high formability,Magnesium-Zinc-Gadolinium(ZG21)wires are developed to bunch the tendon graft for matching the bone tunnel during ***,tensile strength,degradation,and cytotoxicity of ZG21 wire are *** rabbit model is used for assessing the biological effects of ZG21 wire by micro-CT,histology,and mechanical *** SEM/EDS,immunochemistry,and in vitro assessments are performed to investigate the underlying *** tests demonstrate the high formability of ZG21 wire as surgical ***-CT shows ZG21 wire degradation accelerates tunnel bone formation,and histologically with earlier and more fibrocartilage regeneration at the healing *** mechanical test shows higher ultimate load in the ZG21 *** SEM/EDS presents ZG21 wire degradation triggered calcium phosphate(Ca-P)*** results demonstrate upregulation of Wnt3a,BMP2,and VEGF at the early phase and TGFβ3 and Type II collagen at the late phase of *** vitro tests also confirmed the Ca-P in the metal extract could elevate the expression of Wnt3a,βcatenin,ocn and opn to stimulate *** vivo tests of clinical samples indicated suturing with ZG21 wire did not weaken the ultimate loading of human tendon *** conclusion,the ZG21 wire is feasible for tendon graft *** degradation products accelerated intra-tunnel endochondral ossification at the early healing stage and therefore enhanced bone-tendon interface healing in ACL reconstruction.

关键词： Magnesium wire ACL reconstruction Magnesium alloy Biomaterials Endochondral ossification

Stabilizing perovskite precursors with the reductive natural amino acid for printable mesoscopic perovskite solar cells

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Journal of Energy Chemistry 2024年第3期90卷 32-39,I0003页

作者： Wenjing Hu Jian Yang Chuang Yang Xufeng Xiao Chaoyang Wang Zhaozhen Cui Qiaojiao Gao Jianhang Qi minghao Xia Yaqiong Su Anyi Mei hongwei Han michael Gratzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsKey Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Huazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry Xi'an Key Laboratory of Sustainable Energy Materials ChemistryState Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an 710049ShaanxiChina

Solution processability significantly advances the development of highly-efficient perovskite solar ***,the precursor solution tends to undergo irreversible degradation reactions,impairing the device performance and ***,we utilize a reductive natural amino acid,Nacetylcysteine(NALC),to stabilize the precursor solution for printable carbon-based hole-conductorfree mesoscopic perovskite solar *** find that I_(2) can be generated in the aged solution containing methylammonium iodide(mi) in an inert atmosphere and speed up the MA-FA^(+)(formamidinium) reaction which produces large-size cations and hinders the formation of perovskite *** effectively stabilizes the precursor via its sulfhydryl group which reduces I_(2) back to I^(-)and provides H^(+).The NALC-stabilized precursor which is aged for 1440 h leads to devices with a power conversion efficiency equivalent to 98% of that for devices prepared with the fresh ***,NALC improves the device power conversion efficiency from 16.16% to 18.41% along with enhanced stability under atmospheric conditions by modifying grain boundaries in perovskite films and reducing associated defects.

关键词： Perovskite solar cells Perovskite precursor Degradation Stabilization Reductive natural amino acid

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小容量发电机出口断路器的瞬态恢复电压研究

高电压技术 2015年第6期41卷 1943-1950页

作者：刘渝根米宏伟王建南马晋佩重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400030

为深入地研究小容量（≤30 MW）的发电机组出口是否也应装设GCB,利用电磁暂态仿真软件PSCAD/EMTDC计算分析了系统中发生失步故障及三相短路故障情况下,12~30 MW小容量发电机出口断路器的瞬态恢复电压（transient recovery voltage,TRV）... 详细信息

为深入地研究小容量（≤30 MW）的发电机组出口是否也应装设GCB,利用电磁暂态仿真软件PSCAD/EMTDC计算分析了系统中发生失步故障及三相短路故障情况下,12~30 MW小容量发电机出口断路器的瞬态恢复电压（transient recovery voltage,TRV）,并研究了降低TRV上升率的措施,从TRV上升率的角度出发确定在何种条件下普通配电型断路器可以替代GCB安装在发电机出口处。计算结果表明：在12、15、18、20、22、30 MW的小容量发电机回路中,分别在发电机出口断路器靠近变压器的一端加装电容量为0.2μF、0.3μF、0.4μF、0.5μF、0.6μF、0.8μF的电容器时,可有效地将TRV上升率降低至0.34 k V/μs以下,此时普通配电型断路器可以替代GCB安装在12~30 MW的发电机出口处。

关键词：小容量发电机普通配电型断路器发电机断路器失步故障三相短路故障瞬态恢复电压

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10kV配电网中性点接地方式的优化研究

高电压技术 2015年第10期41卷 3355-3362页

作者：刘渝根王建南米宏伟马晋佩重庆大学输配电装备及系统安全与新技术国家重点实验室重庆400030 国网浙江省电力公司宁波供电公司宁波315010

针对某市10 k V配电网中性点运行方式存在的问题,提出一种结合中性点经电阻接地和经消弧线圈接地的优化改造方案。用ATP-EMTP建立10 k V配网单相接地故障仿真模型,在两种不同中性点接地方式下,模拟多种单相接地故障。理论分析及仿真实... 详细信息

针对某市10 k V配电网中性点运行方式存在的问题,提出一种结合中性点经电阻接地和经消弧线圈接地的优化改造方案。用ATP-EMTP建立10 k V配网单相接地故障仿真模型,在两种不同中性点接地方式下,模拟多种单相接地故障。理论分析及仿真实验表明,该新型接地方式可有效抑制单相接地时刻的瞬态过电压,当接地故障发生于架空线末端时,中性点、母线和故障点上的瞬态过电压降幅分别为34.7%、25.3%和18.5%;同时,该新型接地方式能够避免虚幻接地现象发生,并且在发生永久性单相接地故障时,可以通过切换并联电阻以实现准确的故障选线。该新型接中性点地方式对于配网安全可靠运行具有重要意义。

关键词：中性点接地方式消弧线圈瞬态过电压弧光接地 ATP-EMTP 故障选线