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A nanostructured Ni/T-Nb_(2)O_(5)@carbon nanofibers as a long-life anode material for lithium-ion batteries

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Rare Metals 2021年第2期40卷 374-382页

作者： Si-Ru He Jian-Peng Zou li-bao chen Yue-Jiao chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China

In this work,nickel/T-Nb_(2)O_(5)nanoparticles encapsulated in mesoporous carbon nanofibers(denoted as Ni/T-Nb_(2)O_(5)@CNFs)are successfully prepared through a simple electrospinning route and succedent heating *** presence of Ni in carbon nanofibers is beneficial for enhancing the electronic conductivity and the initial Coulombic ***/T-Nb_(2)O_(5)nanoparticles are homogeneously incorporated in carbon nanofibers to form a nanocomposite system,which provides effective buffering during the lithiation/delithiation process for cycling *** Ni/TNb_(2)O_(5)@CNFs show high surface area(26.321 m^(2)·g^(-1))and mesoporous microstructure,resulting in higher capacity and excellent rate *** Ni/T-Nb_(2)O_(5)@CNFs exhibit a remarkable capacity of 437 mAh·g^(-1)at a current density of0.5 A·g^(-1)after 230 cycles and a capacity of 173 mAh·g^(-1)at a current density up to 10.0 A·g^(-1)after 1400 *** work indicates that nickel/T-Nb_(2)O_(5)nanoparticles encapsulated in carbon nanofibers can be a promising candidate for anode material in high-power liBs.

关键词： Electrospinning Nickel T-Nb_(2)O_(5) Nanofiber anode lithium-ion batteries

NiCoO2/NiCoP@Ni nanowire arrays:tunable composition and unique structure design for high-performance winding asymmetric hybrid supercapacitors

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Rare Metals 2020年第9期39卷 1034-1044页

作者： Wei-Wei Ning li-bao chen Wei-Feng Wei Yue-Jiao chen Xiao-Yong Zhang State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Transition metal phosphides(TMPs)are recognized as such promising supercapacitor materials for the practical application,due to their superior electrical conductivity and excellent redox ***,self-supported three-dimensional NiCoP nanoparticles embedded in NiCoO2 nano wires(NiCoO2/NiCoP)electrode consisting of nickel cobalt phosphides(NiCoP)with high activity and nickel cobalt oxides(NiCoO2)with good stability were fabricated by a hydrothermal and phosphorization *** electrode integrates the advantages of nanowire arrays for fast ion transport and foam Ni for effective charge transport and *** the proper composition control of the nanohybrid and unique structure design,the optimized NiCoO2/NiCoP-20 exhibits a high specific capacitance of 3204 F·g-1 at 1 A·g-1 in 3 mol·L-1 KOH aqueous electrolyte in a three-electrode ***,the asymmetric supercapacitor assembled with the prepared NiCoO2/NiCoP-20 and activated carbon achieves a specific capacitance of 116 F·g-1 with a high energy density of 40.32 Wh·kg-1 at the power density of 800.18 W·*** practical application is further demonstrated with all-solid-state winding supercapacitor devices,with decent flexibility,in series to light the Central South University(CSU)logo consisting of 21 red LED indicators.

关键词： Transition metal phosphides Tunable composition All-solid-state Flexibility Winding supercapacitor

A label-free colorimetric assay for detection of c-Myc mRNA based on peptide nucleic acid and silver nanoparticles

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Science Bulletin 2016年第4期61卷 276-281页

作者： Xia li Juan Song bao-li chen Bing Wang Rui li Hui-Min Jiang Ji-Feng liu chen-Zhong li Department of Chemistry Liaocheng UniversityLiaocheng 252059 China Key Laboratory of Food Nutrition and Safety Ministry ofEducation Tianjin University of Science and TechnologyTianjin 300457 China Nanobioengineering/Bioelectronics Laboratory Department ofBiomedical Engineering Florida International UniversityMiami FL 33174 USA

A label-free colorimetric protocol based on peptide nucleic acid/silver nanoparticles(PNA/Ag NPs) has been initially proposed for specific recognition of m *** use of the controlled silver nanoparticles aggregation/dispersion by PNA/PNA–RNA complex, proto-oncogene c-Myc m RNA detection can be achieved. Moreover, the PNA/Ag NPs platform can undergo color change in response to target c-Myc m RNA with single-base-mismatch sensitivity, which could further help in visually identify single nucleotide differences in target genes.

关键词： Colorimetric · c-Myc mRNA · Peptidenucleic acid · Silver nanoparticles

In situ formed three-dimensional (3D) lithium-boron(li-B) alloy as a potential anode for next-generation lithium batteries

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Rare Metals 2021年第12期40卷 3494-3500页

作者： Hai-Feng Huang Yi-Na Gui Fu Sun Zhi-Jian liu Hui-Long Ning chen Wu li-bao chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

The practical application of the lithium anode in lithium metal batteries(LMBs) has been hindered by the uncontrollable growth of lithium dendrite and the high volumetric change during cycling. Herein, the in situ formed three-dimensional(3D) lithium-boron(li-B) alloy is suggested as an excellent alternative to the li metal, in which the 3D li B skeleton can mitigate the growth of li dendrites and volumetric change. In this study, the li-B alloy anodes with different B contents were manufactured by high-temperature melting. It was found that the boron content had a significant effect on the electrochemical performance of the li-B alloy. The li-B alloy with the least B content(10 wt%, 10liB) demonstrated the lowest overpotential of 0.0852 V after 300 h and the lowest interface resistance. However, the full cell with 15liB as the anode displayed the best cycling performance of 115 m Ah·g^(-1) after 100 cycles with a columbic efficiency greater than 97%. The obtained results suggest that the in situ formed three-dimensional li-B alloy anode can be an excellent alternative to the li anode via tuning B contents for next-generation high energy density LMBs.

关键词： li-B alloy 3D skeleton Solid electrolyte interface(SEI) Anode lithium metal battery

Coating highly lithiophilic Zn on Cu foil for high-performance lithium metal batteries

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Rare Metals 2022年第4期41卷 1255-1264页

作者： Yun-Xiong Song Wei-Yi Lu Yue-Jiao chen Hao Yang chen Wu Wei-Feng Wei li-bao chen Xiao-Ping Ouyang State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China

lithium metal batteries(LMBs) are ideal candidates for next-generation high energy density energy storage ***,uncontrollable growth of li dendrites due to uneven li plating has restricted the practical application of the li metal ***,we develop a highly lithiophilic Zn coating on commercial Cu foil as a substrate for li metal anode to settle above *** find that the lithiophilic nature of Zn can facilitate homogeneous nucleation and deposition of li on Cu current collector *** addition,the uniform Zn coating can not only decrease the nucleation overpotential but also regulate the electric field *** from the coated Zn layer,the designed anode for half-cell and full-cell tests shows better electrochemical performances compared with the untreated Cu *** work provides a simple and effective way to enable a promising dendrite-free lithium metal anode for large-scale industrial applications.

关键词： lithiophilic Cu collector surface Coated Zn layer Better electrochemical performances lithium metal anode

Open-circuit voltage analysis of p-i-n type amorphous silicon solar cells deposited at low temperature

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Chinese Physics B 2011年第8期20卷 403-407页

作者： Ni Jian Zhang Jian-Jun Cao Yu Wang Xian-bao li Chao chen Xin-liang Geng Xin-Hua Zhao Ying Institute of Photo-electronics Thin Film Devices and Technique of Nankai University Key Laboratory of Photo-electronics Thin Film Devices and Technique of Tianjin Key Laboratory of Photo-electronicInformation Science and Technology of Ministry of Education (Nankai University) Tianjin 300071 China

This paper identifies the contributions of p-a-SiC：H layers and i-a-Si：H layers to the open circuit voltage of p-i-n type a-Si：H solar cells deposited at a low temperature of 125℃. We find that poor quality p-a-SiC：H films under regular conditions lead to a restriction of open circuit voltage although the band gap of the i-layer varies widely. A significant improvement in open circuit voltage has been obtained by using high quality p-~SiC：H films optimized at the ＂low-power regime＂ under low silane flow rates and high hydrogen dilution conditions.

关键词： amorphous silicon solar cell low temperature open-circuit voltage

Age softening phenomenon and microscopic mechanism of li−B alloy

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Transactions of Nonferrous Metals Society of China 2020年第9期30卷 2491-2501页

作者： Hai-feng HUANG Zhi-Jian liU Chao-ping liANG li-bao chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

The age softening phenomenon of the li−B alloy was investigated by a series of tensile tests under various aging *** results show that the tensile strength of the rolled li−B alloy decreases with increasing aging *** aging temperature accelerates the softening process,and leads to an early end of aging.A model was proposed to analyze the mechanism of the age *** vacancy annihilation is the control factor of age *** strength−temperature relationship was estimated by the newly proposed model and a standard heat treatment,annealing at 150℃ for 1 h,was designed to eliminate the age softening of rolled li−B alloy.

关键词： thermal battery li−B alloy age softening lithium metal battery lithium dendrite

以人为本理性看待审慎化解——宪政视角下的群体性事件

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中南民族大学学报（人文社会科学版） 2009年第5期29卷 98-102页

作者：李保臣华中师范大学政治研究院湖北武汉430079

当前我国一些地方出现的群体性事件,客观上给当地群众的生产生活造成了损失和混乱,一定程度上破坏了党群关系、干群关系,增加了社会不稳定因素,但尚不包含政治目的,不具有明显的对抗性,属于社会弱势群体行使宪法赋予的公民权利,采用集... 详细信息

当前我国一些地方出现的群体性事件,客观上给当地群众的生产生活造成了损失和混乱,一定程度上破坏了党群关系、干群关系,增加了社会不稳定因素,但尚不包含政治目的,不具有明显的对抗性,属于社会弱势群体行使宪法赋予的公民权利,采用集体行为表达利益诉求的一种激烈方式,没有超出人民内部矛盾的范畴,处于可控制状态。各级党委政府及相关职能部门必须牢固树立依法治国的理念,坚持以人为本,体现人文关怀,积极预防,妥善处置。

关键词：群体性事件特点原因宪政新思维

The Gray-Markov GM （1, 1） prediction model Optimal Allocation of Equipment Maintenance Personnel Research based on Difference Method

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International Journal of Technology Management 2013年第1期 93-96页

作者： TONG Rui SHEN Mao-xing KANG Jian-she li bao-chen The 93507th Unit ofPLA Luquan 050207China Air Defense and Anti-missile Institute AFEU Xi'an 710051China Ordnance Engineering College Shijiazhuang 050003China

Based on the situation that the statistic of the missile facilities＇ stability was small, and the conventional big example preview method was no longer of use. So, this article used the gray GM （1, 1） model to preview a facility＇ s stability .The gray GM （1, 1） model doesn＇ t need a large number of example statistics, and it is also accurate, so this model solved the problem in the analyze and preview of the stability of the missile＇ s electronic facility system, and it has possibility to imply to engineering use.

关键词： The Gray System GM (1, 1) Stability Preview