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Synthesis and characterization of phosphate-modified LiMn_2O_4 cathode materials for Li-ion battery

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Chinese Chemical Letters 2010年第11期21卷 1382-1386页

作者： Qing Lai Jiang Ke Du Yan bing Cao zhong Dong Peng Guo Rong Hu Ye Xiang Liu School of Metallurgical Science and Engineering Central South University Changsha 410083 China

LiMn2O4 spinel cathode materials were modified with 2 wt.%Li-M-PO4（M=Co,Ni,Mn） by polyol synthesis *** phosphate surface-modified LiMn2O4 cathode materials were physically characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and energy dispersive X-ray spectroscopy（EDS）.The charge-discharge test showed that the cycling and rate capacities of LiMn2O4 cathode materials were significantly enhanced by stabilizing the electrode surface with phosphate.

关键词： Li-ion battery Cathode materials Spinel LiMn2O4 Phosphate Polyol synthesis method

A simulation study of a windowless gas-stripping room in an E//B neutral particle analyzer

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Nuclear Science and Techniques 2021年第7期32卷 22-30页

作者： Yuan Luo Wei-Ping Lin Pei-Pei Ren Guo-Feng Qu Jing-Jun Zhu Xing-Quan Liu Xiao-bing Luo Zhu An Roy Wada Lin-Ge Zang Yu-Fan Qu zhong-bing Shi Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA School of Physics Henan Normal UniversityXinxiang 453007China Southwestern Institute of Physics Chengdu 610064China

The neutral particle analyzer(NPA)is one of the crucial diagnostic devices in a Tokamak *** stripping unit is one of the main parts of the NPA.A windowless gas-stripping room with two differential pipes has been constructed in a parallel electric and magnetic fields(E//B)*** pressure distributions in the stripping chamber are simulated by ANSYS Fluent together with MolFlow+.Based on the pressure distributions obtained from the simulation,the stripping efficiency of the E//B NPA is studied using *** reaction physics is modified to track the charge state of each particle in a cross-section-based method in *** transmission rates(R)and stripping efficiencies f_(+1)are examined for particle energies ranging from 20 to 200 keV with the input pressure(P_(0)),ranging from 20 to 400 *** to the combined global efficiency,R×f_(+1),P_(0)=240 Pa is obtained as the optimum pressure for the maximum global efficiency in the incident energy range investigated.

关键词： Neutral particle analyzer Windowless gas-stripping chamber Stripping efficiency Ansys Fluent MolFlow+ GEANT4

Graphene oxide-composited chitosan scaffold contributes to functional recovery of injured spinal cord in rats

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Neural Regeneration Research 2021年第9期16卷 1829-1835页

作者： bing Yang Pang-Bo Wang Ning Mu Kang Ma Shi Wang Chuan-Yan Yang zhong-bing Huang Ying Lai Hua Feng Guang-Fu Yin Tu-Nan Chen Chen-Shi Hu College of Biomedical Engineering Sichuan UniversityChengduSichuan ProvinceChina Department of Neurosurgery Southwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

The study illustrates that graphene oxide nanosheets can endow materials with continuous electrical conductivity for up to 4 weeks. Conductive nerve scaffolds can bridge a sciatic nerve injury and guide the growth of neurons;however, whether the scaffolds can be used for the repair of spinal cord nerve injuries remains to be explored. In this study, a conductive graphene oxide composited chitosan scaffold was fabricated by genipin crosslinking and lyophilization. The prepared chitosan-graphene oxide scaffold presented a porous structure with an inner diameter of 18–87 μm, and a conductivity that reached 2.83 mS/cm because of good distribution of the graphene oxide nanosheets, which could be degraded by peroxidase. The chitosan-graphene oxide scaffold was transplanted into a T9 total resected rat spinal cord. The results show that the chitosan-graphene oxide scaffold induces nerve cells to grow into the pores between chitosan molecular chains, inducing angiogenesis in regenerated tissue, and promote neuron migration and neural tissue regeneration in the pores of the scaffold, thereby promoting the repair of damaged nerve tissue. The behavioral and electrophysiological results suggest that the chitosan-graphene oxide scaffold could significantly restore the neurological function of rats. Moreover, the functional recovery of rats treated with chitosangraphene oxide scaffold was better than that treated with chitosan scaffold. The results show that graphene oxide could have a positive role in the recovery of neurological function after spinal cord injury by promoting the degradation of the scaffold, adhesion, and migration of nerve cells to the scaffold. This study was approved by the Ethics Committee of Animal Research at the First Affiliated Hospital of Third Military Medical University(Army Medical University)(approval No. AMUWEC20191327) on August 30, 2019.

关键词： angiogenesis chitosan electrical conduction graphene oxide regeneration repair scaffold spinal cord injury

Experimental Study of Thermoelectric Heat Pump Water Heater with Exhaust Heat Recovery from Kitchens

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湖南大学学报（自然科学版） 2009年第S1期36卷 131-135页

作者： LIU zhong-bing,ZHANG Ling,YANG Zhang,XU Ming,HAN Tian-he(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China) College of Civil Engineering Hunan University Changsha 410082 China

A new kind of thermoelectric heat pump water heater for kitchens exhaust heat recovery was presented,and its performances were investigated under different operating *** experiment results show that the coefficient of performance decreases and the temperature difference between the hot and cold sides becomes larger with the increase of the operating voltage,but the heating time becomes *** higher the temperature of water,the greater the temperature difference between the hot and cold sides,leading to a smaller coefficient of *** an exhaust temperature of 36 ℃,the coefficient of performance decreases from 1.66 to 1.22 when the temperature of water increases from 28 ℃ to 46 ℃ with operating voltage 16 *** tests illustrate that,compared with the conventional electrical water heaters,the new kind of thermoelectric heat pump water heater is more coefficient.

关键词： thermoelectric heat pump kitchens exhaust water heater coefficient of performance

A nonlinear wave coupling algorithm and its programing and application in plasma turbulences

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Chinese Physics B 2022年第6期31卷 541-548页

作者： Yong Shen Yu-Hang Shen Jia-Qi Dong Kai-Jun Zhao zhong-bing Shi Ji-Quan Li Southwestern Institute of Physics Chengdu 610041China School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Institute for Fusion Theory and Simulation Zhejiang UniversityHangzhou 310013China College of Nuclear Science and Engineer East China University of TechnologyNanchang 330013China

The fully developed turbulence can be regarded as a nonlinear system,with wave coupling inside,which causes the nonlinear energy to transfer,and drives the turbulence to develop further or be *** analysis is one of the most effective methods to study turbulence *** order to apply it to the study of the nonlinear wave coupling process of edge plasma turbulence,an efficient algorithm based on spectral analysis technology is proposed to solve the nonlinear wave coupling *** algorithm is based on a mandatory temporal static condition with the nonideal spectra separated from the ideal *** realization idea and programing flow are *** to the characteristics of plasma turbulence,the simulation data are constructed and used to verify the algorithm and its implementation *** simulation results and experimental results show the accuracy of the algorithm and the corresponding program,which can play a great role in the studying the energy transfer in edge plasma *** an application,the energy cascade analysis of typical edge plasma turbulence is carried out by using the results of a case ***,a physical picture of the energy transfer in a kind of fully developed turbulence is constructed,which confirms that the energy transfer in this turbulent system develops from lower-frequency region to higher-frequency region and from linear growing wave to damping wave.

关键词： bispectral analysis wave coupling algorithm plasma turbulence energy cascade

Experimental Study of Performance of Thermoelectric Refrigerator under Different Intensity of Heat Emission

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湖南大学学报（自然科学版） 2009年第S1期36卷 127-130页

作者： HAN Tian-he,TANG Guang-fa,GONG Guang-cai,LI Tao,LIU zhong-bing(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China) College of Civil Engineering Hunan University Changsha 410082 China

Heat emission and the voltage are the main factors affecting the refrigerating capacity of semiconductor *** experiments were designed to obtain their influence on refrigerating capacity of semiconductor and the interaction between heat emission and the *** results show that fixing the heat dissipation,there is an optimal working voltage for the semiconductor module;and if improving the heat emission,the refrigerating capacity increases and the optimal voltage becomes *** can provide the basis for the optimal design of semiconductor refrigeration.

关键词： semiconductor refrigeration heat emission optimal working voltage

A Handshake Across the Himalayas

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Qiu Shi 2013年第4期5卷 102-106页

作者： Hu Shisheng zhong bing China Institute of Contemporary International Relations CPC Jiangsu Provincial Party School

Study of the reactivity of radical-molecular addition reaction using density functional theory

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Chinese Science Bulletin 2001年第6期46卷 480-482页

作者： WANG Guichang SHANG Zhenfeng YANG Zuoyin PAN Yinming CAI Zunsheng ZHAO Xuezhuang LI Yongwang SUN Yuhan zhong bing Department of Chemistry Nankai UniversityTianjin 300071China Insititute of Coal Chemistry Chinese Academy of SciencesTaiyuan 030001China

The reactivity of radical-molecular addition reaction was studied in terms of density-functional theory (DFT) and Hartree-Fock theory (HFT). It was found that the DFT method can give more accurate estimated result than the HFT method. The reason might be that the energy of the highest occupied molecular orbital (HOMO) in DFT is not the ionization energy, but rather represents the change in the total energy with respect to the change in occupation number of electrons in the HOMO, consistent with the concept of the transition state. The energy of HOMO in HFT is the ionization energy, which may represent more properly the property of the products and reactants themselves.

关键词： addition reaction rate constant density-functional theory Hartree-Fock-theory.

超细Mo-Co-K催化剂合成低碳醇性能的研究

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燃料化学学报 2000年第2期28卷 111-115页

作者：张业钟炳中国科学院山西煤炭化学研究所煤转化国家重点实验室太原030001

采用类凝胶法和超临界干燥技术制得超细Mo -Co -K催化剂。研究了还原态催化剂上CO加氢合成低碳醇的反应性能 ,考察了不同钼钴比、钾盐助剂含量和反应条件对合成低碳醇性能的影响。在 30 0℃、6 0MPa、1 0 0 0 0h- 1 的反应条件下 ,超细M... 详细信息

采用类凝胶法和超临界干燥技术制得超细Mo -Co -K催化剂。研究了还原态催化剂上CO加氢合成低碳醇的反应性能 ,考察了不同钼钴比、钾盐助剂含量和反应条件对合成低碳醇性能的影响。在 30 0℃、6 0MPa、1 0 0 0 0h- 1 的反应条件下 ,超细Mo -Co -K(Mo/Co =7∶1 ,K含量为 1 % )催化剂上低碳醇的时空产率达到 62 4 4g/kg -cat h ,醇选择性为 48 5% ,C2 +OH/C1 OH =1 0 8。

关键词：超细催化剂低碳醇性能钼钴钾催化剂