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Amorphous CoSnO_3@rGO nanocomposite as an efficient cathode catalyst for long-life Li-O_2 batteries

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Chinese Journal of Catalysis 2018年第12期39卷 1951-1959页

作者： Guanghui Yue Jiandi Liu Jiangtao Han Donghui Qin Qiang Chen Jianxiong Shao Department of Materials Science and Engineering Xiamen UniversityXiamen 361005FujianChina Department of Electronic Science Xiamen UniversityXiamen 361005FujianChina School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000GuansuChina

An amorphous CoSnO3@rGO nanocomposite fabricated using a surfactant‐assisted assembly method combined with thermal treatment served as a catalyst for non‐aqueous lithium‐oxygen(Li‐O2)*** contrast to the specific surface area of the bare CoSnO3 nanoboxes(104.3 m2 g–1),the specific surface area of the CoSnO3@rGO nanocomposite increased to approximately 195.8 m2 g–1 and the electronic conductivity also *** increased specific surface area provided more space for the deposition of Li2O2,while the improved electronic conductivity accelerated the decomposition of *** to bare CoSnO3,the overpotential reduced by approximately 20 and 60 mV at current densities of 100 and 500 mA g?1 when CoSnO3@rGO was used as the catalyst.A Li‐O2 battery using a CoSnO3@rGO nanocomposite as the cathode catalyst cycled indicated a superior cyclic stability of approximately 130 cycles at a current density of 200 mA g–1 with a limited capacity of 1000 mAh g–1,which is 25 cycles more than that of the bare amorphous CoSnO3 nanoboxes.

关键词： Amorphous CoSnO3 nanoboxe Nanocomposite Li‐O2 battery cathode catalyst

2H-MoS_(2)Modified Nitrogen-Doped Hollow Mesoporous Carbon Spheres as the Efficient Catalytic cathode catalyst for Aprotic Lithium-Oxygen Batteries

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Renewables 2023年第1期1卷 100-111页

作者： Zhaorui Zhou Lanling Zhao Yao Liu Deyuan Li Qing Xia Jun Wang Zidong Zhang Xue Han Yuxin Long Yiming Zhang Yebing Li Shulei Chou Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061 School of Physics Shandong UniversityJinan 250100 Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035

Developing excellent cathode catalysts with superior catalytic activities is essential for the practical application of aprotic lithium-oxygen batteries(LOBs).Herein,we successfully synthesized nitrogen-doped hollow mesoporous carbon spheres encapsulated with molybdenum disulfide(MoS_(2))nanosheets as the cathode catalyst for rechargeable LOBs,and the relationship between the battery performance and structural characteristics was intensively *** found that the synergistic effect of the nitrogen-doped mesoporous carbon and MoS_(2)nanosheets endows superior electrocatalytic activities to the composite *** the one hand,the nitrogen-doped mesoporous carbon could enable fast charge transfer and effectively accommodate more discharging products in the composite *** the other hand,the thin MoS_(2)nanosheets could promote mass transportation to facilitate the revisable formation and decomposition of the Li2O2 during oxygen reduction reaction and oxygen evolution reaction,and the side reactions were also prevented,apparently due to their full coverage on the composite *** a result,the catalytic cathode loaded with 2H-MoS_(2)-modified nitrogen-doped hollow mesoporous carbon spheres exhibited excellent electrochemical performance in terms of large discharge-/charge-specific capacities with low overpotentials and extended cycling life,and they hold great promise for acting as the cathode catalyst for high-performance LOBs.

关键词： 2H-MoS_(2)nanosheets nitrogen-doped hollow mesoporous carbon spheres cathode catalyst electrocatalysis lithium-oxygen batteries

Hollow catalysts through different etching treatments to improve active sites and oxygen vacancies for high-performance Li-O_(2)battery

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Nano Research 2023年第5期16卷 6798-6804页

作者： Jiachen Qiu Yuran Lin Shuting Zhang Jie Ma Yu Zhang Mengwei Yuan Genban Sun Caiyun Nan Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China Department of Chemistry Tsinghua UniversityBeijing 100084China

Li-O_(2)batteries are regarded as one of the most promising next-generation battery systems due to their high theoretical energy density,finding effective cathode catalysts with fine-tuned structure is a key way to improve the ***,based on the structure of cubic zeolitic imidazolate framework-67(ZIF-67),a series of hollow catalysts were synthesized by different chemical etching ***,from the perspective of metal,nickel nitrate is used for etching,hollow Ni ZIF is obtained through Kirkendall ***,hollow TA-ZIF is obtained by adding tannic acid to replace the methylimidazole *** structures have larger surface areas,materials can expose more active sites,which can lead to better performance of Li-O_(2)*** this basis,having more oxygen vacancies can also improve the battery *** the same time,further loading noble metal ruthenium on the synthesized cobalt-based catalyst can effectively reduce the overpotential of Li-O_(2)battery and improve the battery *** TA-ZIF with more stable hollow structure and more oxygen vacancies,the cycle performance reaches 330 cycles after loading *** with the 64 cycles of solid Co_(3)O_(4),it has a great improvement.

关键词： hollow structure active sites oxygen vacancies noble metal cathode catalyst Li-O_(2)battery

In situ decoration of nanosized metal oxide on highly conductive MXene nanosheets as efficient catalyst for Li-O2 battery

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Journal of Energy Chemistry 2020年第8期29卷 272-280,I0010页

作者： Xingyu Li Caiying Wen Huifeng Li Genban Sun Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China

Combining nanomaterials with complementary properties in a well-designed structure is an effective tactic to exploit multifunctional, high-performance materials for the energy conversion and storage. Nonprecious metal catalysts, such as cobalt oxide, with superior activity and excellent stability to other catalysts are widely desired. Nevertheless, the performance of CoO nanoparticles as an electrode material were significantly limit for its inferior conductivity, dissolution, and high cohesion. Herein, we grow ultrafine cobalt monoxide to decorate the interlayer and surface of the Ti3C2 Txnanosheets via a hydrothermal method companied by calcination. The layered MXenes act as the underlying conductive substrate,which not only increase the electron transfer rate at the interface but also greatly improve the electrochemical properties of the nanosized Co O particles by restricting the aggregation of CoO. The resulting CoO/Ti3C2 Txnanomaterial is applied as oxygen electrode for lithium-oxygen battery and achieves more than 160 cycles and first cycle capacity of 16,220 mAh g-1 at 100 mA g-1. This work paves a promising avenue for constructing a bi-functional catalyst by coupling the active component of a transition metal oxide(TMO) with the MXene materials in lithium-oxygen battery.

关键词： MXene Nanosized CoO Li-O2 batteries cathode catalyst

Highly polar CoP/Co_(2)P heterojunction composite as efficient cathode electrocatalyst for Li-air battery

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Chinese Chemical Letters 2024年第9期35卷 486-490页

作者： Miaomiao Li Mengwei Yuan Xingzi Zheng Kunyu Han Genban Sun Fujun Li Huifeng Li Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Center for Advanced Materials Research Beijing Normal UniversityZhuhai 519087China

In order to advance the commercialization of rechargeable Li-air batteries,it is of importance to explore cathode catalyst with efficient catalytic *** metal oxides have poor electrical conductivity,while cobalt phosphide has excellent electrical conductivity and large specific surface ***,its application in organic Li-air batteries has been much less studied,and the electrocatalytic activity desires to be further ***,CoP/Co_(2)P heterojunction composite with higher polarity was *** discharge product of high-polarity CoP/Co_(2)P had a new porous box-like morphology,which was easy to be decomposed and exposed more active *** highly polar CoP/Co_(2)P heterostructure composite had homogeneous pores,the synergistic effect existed between CoP and Co_(2)P,and the discharge product was porous box mixed with Li_(2)O_(2)and LiOH,which made CoP/Co_(2)P achieve high specific capacity of14632 m Ah/g and cycle stably 161 times when used as air electrode cathode *** work furnished a thought for the construction of cathode catalysts with efficient catalytic activity for Li-air batteries.

关键词： Li-air battery cathode catalyst CoP/Co_(2)P Heterojunction structure High polarity

Ultrafine RuO_(2) nanoparticles/MWCNTs cathodes for rechargeable Na-CO_(2) batteries with accelerated kinetics of Na_(2)CO_(3) decomposition

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Chinese Chemical Letters 2023年第3期34卷 531-535页

作者： Zhenzhen Wang Yichao Cai Youxuan Ni Yong Lu Liu Lin Haoxiang Sun Haixia Li Zhenhua Yan Qing Zhao Jun Chen Haihe Laboratory of Sustainable Chemical Transformations Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China

Na-CO_(2) batteries have attracted extensive attention due to their high theoretical energy density(1125 Wh/kg),efficient utilization of CO_(2),and abundant sodium ***,they are trapped by the sluggish decomposition kinetic of discharge products (mainly Na_(2)CO_(3)) on cathode side during the charging *** we prepared a series of nano-composites composed of RuO_(2) nanoparticles in situ loaded on activated multi-walled carbon nanotubes (RuO_(2)@a-MWCNTs) through hydrolyzing reaction followed by calcination method and used them as cathode catalysts to accelerate the decomposition of Na_(2)CO_(3).Among all catalysts,the RuO_(2)@a-MWCNTs with appropriate ratio of RuO_(2)(49.7 wt%) demonstrated best stability and rate performance in Na-CO_(2) batteries,benefiting from both high specific surface area (160.3 m^(2)/g) and highly dispersed RuO_(2) with ultrafine nanostructures (~2 nm).At a limited capacity of 500 mAh/g,Na-CO_(2) batteries could afford the operation of over 120 cycles at 100 mA/g,and even at the current density to 500 mA/g,the charge voltage was still lower than 4.0 V after 40 *** theoretical calculations proved that RuO_(2) was the catalytically active center and contributed to the decomposition of Na_(2)CO_(3) by weakening the C=O *** synergetic functions of high specific surface(CNTs) and high catalytic activity (RuO_(2)) will inspire more progress on metal-CO_(2) batteries.

关键词： Na-CO_(2)batteries cathode catalyst RuO_(2)@a-MWCNTs High rate performance Low charge overpotential

MOF-template derived hollow CeO_(2)/Co_(3)O_(4) polyhedrons with efficient cathode catalytic capability in Li-O_(2) batteries

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Chinese Chemical Letters 2021年第8期32卷 2438-2442页

作者： Pengxiang Zhang Jiajia Li Juanjuan Feng Yu Wang Aili Xu Tingting Chen Lingwen Zhao Feng Dang Xihua Zhang Hongchao Wang School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJi’nan 250100China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJi’nan 250061China

Li-O_(2) batteries(LOBs) have been perceived as the most potential clean energy system for fast-growing electric vehicles by reason of their environmentally friendlier,high energy density and high ***,there are still some issues limiting the practical application of LOBs,such as the large gap between the actual capacity level and the theoretical capacity,low rate performance as well as short cycle ***,hollow CeO_(2)/Co_(3)O_(4) polyhedrons have been synthesized by MOF template with a simple *** it is was further served as a cathode catalyst in Li-O_(2) *** means of the synergistic effect of two different transition metal oxides,nano-sized hollow porous CeO_(2)/Co_(3)O_(4) cathode obtained better capacity and cycle *** a result,excellent cyclability of exceeding 140 and 90 cycles are achieved at a fixed capacity of 600 and 1000 mAh/g,*** successful application of this catalyst in LOBs offers a novel route in the aspect of the synthesis of other hollow porous composite oxides as catalysts for cathodes in LOBs systems by the MOF template method.

关键词： Li-O_(2)batteries Co_(3)O_(4) CeO_(2) Hollow nanostructure cathode catalyst

Three-in-one Fe-porphyrin based hybrid nanosheets for enhanced CO_(2)reduction and evolution kinetics in Li-CO_(2)battery

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Chinese Chemical Letters 2023年第6期34卷 471-475页

作者： Shan Li Jian-Hui Wang Long-Zhang Dong Yu Zhang Xiao-Man Yao Yifa Chen Shun-Li Li Ya-Qian Lan Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power BatteriesSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)Key Lab.of ETESPG(GHEI)School of ChemistrySouth China Normal UniversityGuangzhou 510006China

Efficient cathode-catalysts with multi-functional properties are essential for Li-CO_(2)battery,while the construction of them with simultaneously enhanced CO_(2)reduction and evolution kinetics is still ***,a kind of hybrid nanosheets based on Ru nanoparticles,Fe-TAPP and grapheme oxide(GO)has been designed through a one-pot self-assembly *** Ru,Fe-porphyrin and GO based hybrid nanosheets(denoted as Ru/Fe-TAPP@GO)with integrated multi-components offer characteristics of ultrathin thickness(~4 nm),high electro-redox property,uniformly dispersed morphology,and high electrical conductivity,*** features endow Ru/Fe-TAPP@GO with ultra-low overpotential(0.82 V)and fully reversible discharge/charge property with a high specific-capacity of 39,000 m Ah/g within 2.0-4.5 V at 100 m A/g,which are much superior to Ru@GO and Fe-TAPP@*** achieved performance was presented as one of the best cathode-catalysts reported to *** synergistically enhanced activity originated from the integrated hybrid nanosheets may provide a new pathway for designing efficient cathode-catalysts for Li-CO_(2)batteries.

关键词： Single-metal sites Porphyrin Li-CO_(2)battery cathode catalyst Ru nanoparticles

Co_3O_4 supported on N,P-doped carbon as a bifunctional electrocatalyst for oxygen reduction and evolution reactions

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Chinese Journal of Catalysis 2016年第8期37卷 1249-1256页

作者：黄颖彬张敏柳鹏程发良王立世东莞理工学院广东省新型纳米材料工程技术研究中心广东东莞523808 华南理工大学化学与化工学院广东广州510640

Noble metals, such as platinum, ruthenium and iridium‐group metals, are often used as oxygen reduction or evolution reaction （ORR/OER） electrocatalysts. To reduce the cost and provide an application of bifunctional catalysis, in this work, cobalt oxide supported on nitrogen and phospho‐rus co‐doped carbon （Co3O4/NPC） was fabricated and examined as a bifunctional electrocatalyst for OER and ORR. To prepare Co3O4/NPC, NPC was pyrolyzed from melamine and phytic acid support‐ed on carbon, followed by the solvothermal synthesis of Co3O4 on NPC. Linear sweep voltammetry was used to evaluate the activity for OER and ORR. For OER, Co3O4/NPC showed an onset potential of 0.54 V （versus the saturated calomel electrode） and a current density of 21.95 mA/cm2 at 0.80 V, which was better than both Co3O4/C and NPC. The high activity of Co3O4/NPC was attributed to a synergistic effect of the N, P co‐dopants and Co3O4. For ORR, Co3O4/NPC exhibited an activity close to commercial Pt/C in terms of the diffusion limited current density （–4.49 vs–4.76 mA/cm2 at–0.80 V）, and Co3O4 played the key role for the catalysis. Chronoamperometry （current versus time） was used to evaluate the stability, which showed that Co3O4/NPC maintained 46%current after the chronoamperometry test for OER and 95% current for ORR. Overall, Co3O4/NPC exhibited high activity and improved stability for both OER and ORR.

关键词： cathode catalyst Oxygen reduction reaction Oxygen evolution reaction Doped carbon Cobalt