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包覆性材料的研究进展 被引量:1
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作者 陈华 鞠景喜 +3 位作者 魏小娟 施春苗 魏青 王惟 《浙江冶金》 2016年第3期1-8,共8页
本文介绍了包覆性材料的主要合成方法、包覆物的研究进展及在主要行业中的应用,并对包覆技术的发展进行了展望。
关键词 包覆性材料 化学合成 化学气相沉积 原子层沉积
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Surface modification of calcium carbonate:A review of theories,methods and applications 被引量:16
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作者 LI Chun-quan LIANG Chao +4 位作者 CHEN Zhen-ming DI Yong-hao ZHENG Shui-lin WEI Shi SUN Zhi-ming 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第9期2589-2611,共23页
Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and biocompa... Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and biocompatibility.Nevertheless,in order to obtain the good filling effect,calcium carbonate needs to be surface modified by organic molecules so as to enhance the dispersion and compatibility within the composites.This review paper systematically introduces the theory,methods,and applications progress of calcium carbonate with surface modification.Additionally,the key factors that affect the properties of the composites as well as the current difficulties and challenges are highlighted.The current research progress and potential application prospects of calcium carbonate in the fields of plastics,rubber,paper,medicine and environmental protection are discussed as well.Generally,this review can provide valuable reference for the modification and comprehensive utilization of calcium carbonate. 展开更多
关键词 calcium carbonate surface modification polymer-based composite monolayer coating modification mechanism
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Li_(1.4)Al_(0.4)Ti_(1.6)(PO_(4))_(3) coated Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2) for enhancing electrochemical performance of lithium-ion batteries 被引量:1
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作者 LAI Xiang-wan HU Guo-rong +3 位作者 PENG Zhong-dong CAO Yan-bing DU Ke LIU Ye-xiang 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第5期1463-1478,共16页
Lithium(Li)-rich manganese(Mn)-based cathode Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2)(LRNCM)has attracted considerable attention owing to its high specific discharge capacity and low cost.However,unsatisfactory cycle ... Lithium(Li)-rich manganese(Mn)-based cathode Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2)(LRNCM)has attracted considerable attention owing to its high specific discharge capacity and low cost.However,unsatisfactory cycle performance and poor rate property hinder its large-scale application.The fast ionic conductor has been widely used as the cathode coating material because of its superior stability and excellent lithium-ion conductivity rate.In this study,Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2) is modified by using Li_(1.4)Al_(0.4)Ti_(1.6)(PO_(4))_(3)(LATP)ionic conductor.The electrochemical test results show that the discharge capacity of the resulting LRNCM@LATP1 sample is 198 mA·h/g after 100 cycles at 0.2C,with a capacity retention of 81%.Compared with the uncoated pristine LRNCM(188.4 m A·h/g and 76%),LRNCM after the LATP modification shows superior cycle performance.Moreover,the lithium-ion diffusion coefficient D_(Li+)is a crucial factor affecting the rate performance,and the D_(Li+)of the LRNCM material is improved from 4.94×10^(-13) to 5.68×10^(-12)cm^(2)/s after modification.The specific capacity of LRNCM@LATP1 reaches 102.5 mA·h/g at 5C,with an improved rate performance.Thus,the modification layer can considerably enhance the electrochemical performance of LRNCM. 展开更多
关键词 surface modification Li-rich cathode material electrochemical performance Li_(1.4)Al_(0.4)Ti_(1.6)(PO_(4))_(3) Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2) Li-ion batteries
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Characterization and adsorption behaviors of a novel synthesized mesoporous silica coated carbon composite 被引量:2
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作者 Sai Wang Songsong Xu +5 位作者 Chengbao Liu Feng Chen Dongtian Wang Shouqing Liu Zhigang Chen Zhengying Wu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第1期190-195,共6页
A novel mesoporous silica coated carbon composite(denoted SEG) with hierarchical pore structure has been successfully prepared in an aqueous solution that contains triblock copolymer template, aluminum chloride, silic... A novel mesoporous silica coated carbon composite(denoted SEG) with hierarchical pore structure has been successfully prepared in an aqueous solution that contains triblock copolymer template, aluminum chloride, siliceous source and expanded graphite. Textural property and morphology of the SEG composite were characterized by the combination of X-ray diffraction, N_2 adsorption–desorption, scanning electron microscopy,transmission electron microscopy and Fourier transform infrared measurements. Results show that mesoporous silica is steadily and uniformly grown on the surface of the graphite slices and the thickness of the silica layer can be finely tuned according to the silica/C molar ratio in the initial reaction solution. This newly synthesized SEG composite shows greatly increased adsorption capacity to methylene blue than the pristine expanded graphite in the batch tests. Both Langmuir and Frendlich models were further used to evaluate the adsorption isotherms of methylene blue over expanded graphite and SEG samples with different silica contents. Finally, pseudosecond-order model was used to describe the kinetics of methylene blue over expanded graphite and the silica-carbon composites. 展开更多
关键词 Mesoporous silica Expanded graphite Composite Synthesis Adsorption
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Encapsulated MnO in N-doping carbon nanofibers as efficient ORR electrocatalysts 被引量:7
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作者 Chaoqun Shang Mingyang Yang +10 位作者 Zhenyu Wang Minchan Li Meng Liu Jian Zhu Yinggang Zhu Liangjun Zhou Hua Cheng Yingying Gu Yougen Tang Xingzhong Zhao Zhouguang Lu 《Science China Materials》 SCIE EI CSCD 2017年第10期937-946,共10页
Development of cheap,abundant and noblemetal-free materials as high efficient oxygen reduction electrocatalysts is crucial for future energy storage system. Here,one-dimensional(1D) MnO N-doped carbon nanofibers(Mn... Development of cheap,abundant and noblemetal-free materials as high efficient oxygen reduction electrocatalysts is crucial for future energy storage system. Here,one-dimensional(1D) MnO N-doped carbon nanofibers(MnO-NCNFs) were successfully developed by electrospinning combined with high temperature pyrolysis. The MnO-NCNFs exhibit promising electrochemical performance,methanol tolerance,and durability in alkaline medium. The outstanding electrocatalytic activity is mainly attributed to several issues.First of all,the uniform 1D fiber structure and the conductive network could facilitate the electron transport. Besides,the introduction of Mn into the precursor can catalyze the transformation of amorphous carbon to graphite carbon,while the improved graphitization means better conductivity,beneficial for the enhancement of catalytic activity for oxygen reduction reaction(ORR). Furthermore,the porous structure and high surface area can effectively decrease the mass transport resistance and increase the exposed ORR active sites,thus improve utilization efficiency and raise the quantity of exposed ORR active sites. The synergistic effect of MnO and NCNFs matrix,which enhances charge transfer,adsorbent transport,and delivers efficiency in the electrolyte solution,ensures the high ORR performance of MnO-NCNFs. 展开更多
关键词 ELECTROSPINNING MNO N-doping carbon nanofibers GRAPHITIZATION oxygen reduction electrocatalysts
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