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co.struction of uniform CuO nanoshells and its application in high-voltage cathode materials

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Progress in Natural Science:Materials International 2024年第4期34卷 747-752页

作者： Xian-Sen Tao Xianhong Li En-Wei Hou Zhongxuan Ma Ke Yang Jianping Ma Jingquan Sha The Talent Culturing Plan for Leading Disciplines of Shandong Province School of Chemistry Chemical Engineering and Materials Jining University Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Shandong sacred sun power sources co. Ltd

CuO co.ting layers have attracted numerous attention due to its wide application in catalysis, batteries and other areas. However, the unco.trollable precipitation process of Cu2+has made it challenging to form uniform CuO nanoshells. In this study, uniform CuO nanoshells were prepared through a delicate design. Namely, the uniform Cu2+-poly（m-phenylenediamine）(Cu-PmPD) nanoshells were co.structed firstly, and then the organic parts in the Cu-PmPD were removed while uniform CuO nanoshells formed in the co.trollable calcination *** this method to high-voltage cathode materials, the CuO was successfully co.ted on the LiNi0.5Mn1.5O4,which greatly reduced the transition metal dissolution and improved the electrochemical performance in lithiumion batteries.

关键词： Nanoshells co.per oxide Lithium-ion batteries LiNi0·5Mn1·5O4

Alloy/layer double hydroxide interphasic synergy via nano-heterointerfacing for highly reversible co.(2)redox reaction in Li-co.(2)batteries

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Nano Research 2024年第6期17卷 5206-5215页

作者： Tianzhen Jian Wenqing Ma Jiagang Hou Jianping Ma Xianhong Li Haiyang Gao Caixia Xu Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Kyiv co.lege at Qilu University of Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Shandong sacred sun power sources co. Ltd.Qufu 273100China

Li-co.(2)batteries are among the most intriguing techniques for balancing the carbon cycle,but are challenged by the annoyed thermodynamic barrier of the Li_(2)co.(3)deco.position ***,we demonstrate the electrocatalytic performances of two-dimensional(2D)co.l-layer double hydroxide(LDH)nanosheets can be significantly improved by trans-dimensional crosslinking with three-dimensional(3D)multilevel nanoporous(MP)-Ruco.l alloy(MP-Ruco.l alloy⊥co.l-LDH).The MP-Ruco.l alloy⊥co.l-LDH with multiscale pore channels and abundant nano-heterointerface is directly prepared by co.trollable etching Al from a Ru-co.Al master alloy along with simultaneous partial oxidization of Al and co.*** MP-Ruco.l is co.posed of various intermetallic co.pounds and Ru with abundant grain boundaries,and forms numerous heterointerface with 2D co.l-LDH *** multiscale porous metallic network benefits mass and electron transportation as well as discharge product storage and enables a rich multiphase reaction *** situ differential electrochemical mass spectrometry shows that the mass-to-charge ratio in the charging process is~0.733 which is co.sistent with the theoretical value of 3/4,stating that the reversible co.deco.position of Li_(2)co.(3)and C can be achieved with the MP-Ruco.l alloy⊥*** Ketjen black(KB)/MP-Ruco.l⊥co.l-LDH battery demonstrates a high cyclability for over 2270 h(227 cycles)with a lower voltage gap stabilized at~1.3 V at 200 mA·g^(−1).Our findings here provide useful guidelines for developing high efficiency transition metal based electrocatalysts by co.pling with co.ductive porous substrate for impelling the development of practical Li-co.(2)battery systems.

关键词： heterojunction interface nanoporous Li-co.(2)battery dealloying

Enhancing zinc storage performance of Mn_(3)O_(4)cathode through Ag-doping and-crosslinking dual-modification strategy

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Transactions of Nonferrous Metals Society of China 2024年第11期34卷 3693-3706页

作者： Xin-yuan WANG Tian-zhen JIAN Ya-ting YANG Jian-ping MA Xian-hong LI Zi-long XUE Wen-qing MA Cai-xia XU Institute for Advanced Interdisciplinary Research Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Shandong sacred sun power sources co. Ltd.Qufu 273100China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Octahedral Mn_(3)O_(4)nanoparticles with an Ag-doping and nanoporous Ag(NPS)framework was simply fabricated through an alloying-etching *** dual-modified Mn_(3)O_(4)(denoted as Ag−Mn_(3)O_(4)/NPS)co.sists of Ag-doped Mn_(3)O_(4)nanoparticles crosslinked with three dimensional nanoporous Ag *** inco.porated Ag dopant is effective in improving the intrinsic ionic and electronic co.ductivities of Mn_(3)O_(4),while the NPS framework is introduced to improve the electron/mass transfer across the entire *** from the dual-modification strategy,the Ag−Mn_(3)O_(4)/NPS exhibits admirable rate capability and cycling stability.A high reversible capacity of 88.7 mA·h/g can still be retained for over 1000 cycles at a current density of 1 A/***,a series of ex-situ experimental techniques indicate that for Ag−Mn_(3)O_(4)/NPS electrode during the zinc ion storage,Mn_(3)O_(4)is electrochemically oxidized into various MnOx(e.g.,Mn_(2)O_(3),MnO2)species in the initial charging,and the subsequent battery reaction is actually the intercalation/deintercalation of H+and Zn2+into MnOx.

关键词： Ag-doped Mn_(3)O_(4) zinc ion battery nanoporous Ag dealloying

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Transforming Cu into Cu_(2)O/RuAl intermetallic heterojunction for lowering the thermodynamic energy barrier of the co.(2) reduction and evolution reactions in Li-co.(2) battery

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Journal of Energy Chemistry 2024年第11期98卷 531-540页

作者： Wenqing Ma Jiagang Hou Siyu Liu Tianzhen Jian Jianping Ma Caixia Xu Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022ShandongChina Kyiv co.lege at Qilu University of Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353ShandongChina Nano-Science Center&Department of Chemistry University of CopenhagenCopenhagen 2100Denmark Shandong sacred sun power sources co.ltd. Qufu 273100ShandongChina State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina

The Li-co.(2) battery has been under the spotlight of future battery technologies since it can achieve co.(2)utilization and energy co.version ***,its advancement is hampered by poor energy efficiency and limited reversibility due to the sluggish kinetics of the co.(2) reduction and evolution ***,a multiscale nanoporous interpenetrating phase nanohybrid of RuAl intermetallic and Cu_(2)O(MP-Cu_(2)O/RuAl) was carved by driving synchronous phase and microstructure evolutions through dealloying of one RuCuAl master *** built-in RuAl intermetallic and Cu_(2)O closely stack to form abundant nano-interfaces with revolutionized electronic structure,The theoretical simulations reveal that the Cu_(2)O/RuAl interface can distinctly reduce the energy barrier of the Li_(2)co.(3) deco.position reaction,The interco.nected pore channels with large surface area can enhance catalytic site accessibility,mass transfer,and uniform deposition of the discharge *** situ differential electrochemical mass spectrometry discloses that the co.(2)-to-electron ratio during charging co.ncides with the theoretical value of 3/4,demonstrating the high efficacy of MP-Cu_(2)O/RuAl in achieving the recycling of co.(2).The dealloying protoco. provides an affordable platform to empower transition metal oxides into high-efficiency electrocatalysts by hybridizing with metallic nano-sponge for advancing the application of Li-co.(2)batteries.

关键词： Intermetallic Cu_(2)O Heterostructure Nanoporous Lithium–co.(2)battery

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