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Scaffold-regulation buffered MoS_(2)anode kinetics for high-performance Na-/K-ion storage

Journal of Materials Science & Technology 2023年第14期145卷 14-24页

作者： tuzhi xiong Xincheng Yao David Adekoya Hao Yang M-Sadeeq Balogun College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082China Centre for Clean Environment and Energy Griffith School of EnvironmentGold Coast CampusGriffith UniversityQLD4222Australia Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanning 530004China

Designing a highly conductive scaffold with unique function has great significance in elevating the stor-age properties of molybdenum sulfide(MoS_(2))for sodium-and potassium-ion ***,we show that forming a three-dimensional(3D)highly conductive dual backbone that consists of titanium nitride nanowires(TiN)coated on 3D carbon fiber(CF)could suppress the poor conductivity of MoS_(2).Theo-retical calculations predict that both TiN and CF boost the electronic conductivity,while the MoS_(2)will promote high ionic adsorption owing to the suitable adsorption *** as-prepared CF@TiN/MoS_(2),with mass loading up to 12.5 mg cm^(−2),achieves a high areal capacity of up to 5.40 mAh cm^(−2)under the current density of 0.6 mA cm^(−2)for sodium *** excellent performance of the hybrid can be attributed to buffer and conductivity enhancer features,allowing Na-ion to directly have contact with the CF@TiN/MoS_(2)hybrid.A series of electrochemical analyses including cyclic voltammetry and symmetric cell analyses affirm the significant improvement in transport *** importantly,the CF@TiN/MoS_(2)also achieves a high areal capacity of 3.29 mAh cm^(−2)under the current density of 0.3 mA cm^(−2)as anode material for potassium ion batteries(PIBs),demonstrating that the scaffold-regulated strategy is a feasible strategy to enhance the kinetics of MoS_(2)-based anodes for secondary-ion batteries and beyond.

关键词： MoS_(2)nanosheets Flexible conductive TiN nanowires Kinetics High areal capacity Sodium-and potassium-ion batteries

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Deciphering the lithium storage chemistry in flexible carbon fiber-based self-supportive electrodes

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Carbon Energy 2022年第5期4卷 820-832页

作者： Hao Yang tuzhi xiong Zhixiao Zhu Ran Xiao Xincheng Yao Yongchao Huang M.-Sadeeq Balogun College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangshaPeople's Republic of China Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanningPeople's Republic of China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Institute of Environmental Research at Greater BayMinistry of EducationGuangzhou UniversityGuangzhouChina

Flexible carbon fiber cloth(CFC)is an important scaffold and/or current collector for active materials in the development of flexible self-supportive electrode materials(SSEMs),especially in lithium-ion ***,during the intercalation of Li ions into the matrix of CFC(below 0.5 V ***/Li+),the incompatibility in the capacity of the CFC,when used directly as an anode material or as a current collector for active materials,leads to difficulty in the estimation of its actual *** address this issue,we prepared Ni_(5)P_(4)nanosheets on CFC(denoted CFC@Ni_(5)P_(4))and investigated the contribution of CFC in the CFC@Ni_(5)P_(4)by comparing to the powder Ni_(5)P_(4)nanosheets traditionally coated on a copper foil(CuF)(denoted P-Ni_(5)P_(4)).At a current density of 0.4 mA cm^(−2),the as-prepared CFC@Ni_(5)P_(4)showed an areal capacity of 7.38 mAh cm^(−2),which is significantly higher than that of the PNi_(5)P_(4)*** importantly,theoretical studies revealed that the CFC has a high Li adsorption energy that contributes to the low Li-ion diffusion energy barrier of the Ni_(5)P_(4)due to the strong interaction between the CFC and Ni_(5)P_(4),leading to the superior Li-ion storage performance of the CFC@Ni_(5)P_(4)over the pristine Ni_(5)P_(4)*** present work unveils the underlying mechanism leading to the achievement of high performance in SSEMs.

关键词： density functional theory flexible carbon fiber cloth lithium-ion batteries Ni5P4 self-supportive electrodes

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Boosted Storage Kinetics in Thick Hierarchical Micro-Nano Carbon Architectures for High Areal Capacity Li-Ion Batteries

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Energy & Environmental Materials 2022年第4期5卷 1251-1259页

作者： Yang Wu Ting Ouyang tuzhi xiong Zhao Jiang Yuwen Hu Jianqiu Deng Zhongmin Wang Yongchao Huang M.-Sadeeq(Jie Tang)Balogun College of Materials Science and Engineering Hunan UniversityChangsha 410082China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan UniversityChangsha 410082China School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan UniversityChangsha 410082China School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin 541004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004China

A practical and effective approach to increase the energy storage capacity of lithium ion batteries(LIBs)is to boost their areal *** thick electrodes is one of the most crucial ways to achieve high areal capacity but limited by sluggish ion/electron transport,poor mechanical stability,and high-cost manufacturing *** we address these constraints by engineering a unique hierarchical-networked 10 mm thick all-carbon electrode,providing a scalable strategy to produce high areal capacity LIB *** hierarchical-networked structure utilizes micrometer-sized carbon fibers(MCFs)as building blocks,nano-sized carbon nanotubes(CNTs)as good continuous network with excellent electrical conductivity,and pyrolytic carbon as the binder and active material with excellent storage *** combination of the above features endows our HNT-MCF/CNT/PC electrode with excellent performance including high reversible capacity of 15.44 mAh cm^(-2) at 2.0 mA cm^(-2) and exhibits excellent rate capability of 2.50 mAh cm^(-2) under 10.0 mA cm^(-2) current *** Li-ion storage mechanism in HNT-MCF/CNT/PC involves dual-storage mechanism including intercalation and surface adsorption(pseudocapacitance)confirmed by the cyclic voltammetry and symmetric cell *** work provides insights into the construction of high mechanical stability thick electrode for the next generation high areal capacity LIBs and beyond.

关键词： dual storage mechanism high-areal-capacity micro-nano carbon architecture rapid kinetics and high mechanical stability thick electrode

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Unveiling the promotion of accelerated water dissociation kinetics on the hydrogen evolution catalysis of NiMoO_(4) nanorods

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Journal of Energy Chemistry 2022年第4期31卷 805-813页

作者： tuzhi xiong Bowen Huang Jingjing Wei Xincheng Yao Ran Xiao Zhixiao Zhu Fang Yang Yongchao Huang Hao Yang M.-Sadeeq(Jie Tang)Balogun College of Materials Science and Engineering Hunan UniversityChangsha 410082HunanChina Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006GuangdongChina Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan UniversityChangsha 410082HunanChina

Nickel molybdate(NiMoO_(4))attracts superior hydrogen desorption behavior but noticeably poor for efficiently driving the hydrogen evolution reaction(HER)in alkaline media due to the sluggish water dissociation ***,we successfully accelerate the water dissociation kinetics of NiMoO_(4)for prominent HER catalytic properties via simultaneous in situ interfacial engineering with molybdenum dioxide(MoO_(2))and doping with phosphorus(P).The as-synthesized P-doped NiMoO_(4)/MoO_(2)heterostructure nanorods exhibit outstanding HER performance with an extraordinary low overpotential of-23 m V at a current density of 10 m A cm^(-2),which is highly comparable to the performance of the state-of-art Pt/C coated on nickel foam(NF)*** density functional theory(DFT)analysis reveals the enhanced performance is attributed to the formation of MoO_(2)during the in situ epitaxial growth that substantially reduces the energy barrier of the Volmer pathway,and the introduction of P that provides efficient hydrogen desorption of Ni MoO_(2).This present work creates valuable insight into the utilization of interfacial and doping systems for hydrogen evolution catalysis and beyond.

关键词： NiMoO_(4)/MoO_(2) Water dissociation kinetics Interfacial and doping Density functional theory Hydrogen evolution reaction

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Hetero-interfacial nickel nitride/vanadium oxynitride porous nanosheets as trifunctional electrodes for HER,OER and sodium ion batteries

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Journal of Energy Chemistry 2023年第6期81卷 71-81,I0003页

作者： tuzhi xiong Jingting Li Jagadish Chandra Roy Malcolm Koroma Zhixiao Zhu Hao Yang Lei Zhang Ting Ouyang M.-Sadeeq Balogun Mohammad Al-Mamun College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082HunanChina Centre for Catalysis and Clean Energy Griffith UniversityGold Coast CampusSouthportQLD 4222Australia College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082HunanChina Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanning 530004GuangxiChina Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004GuangxiChina

The development of single electrode with multifunctional purposes for electrochemical devices remains a symbolic challenge in recent *** work explores interfacially-rich transition metal nitride hybrid that consist of nickel nitride and vanadium oxynitride(VO_(0.26)N_(0.52))on robust carbon fiber(denoted CF/Ni_(3)N/VON)as trifunctional electrode for hydrogen evolution reaction(HER),oxygen evolution reaction(OER),and sodium ion batteries(SIBs).The as-prepared CF/Ni_(3)N/VON exhibits low HER overpotential of 48 m V@10 m A cm^(-2),OER overpotential of 287 m V@10 m A cm^(-2),and sodium-ion anode storage reversible capacity of 555 m A h g^(-1)@0.2 *** analyses reveal that the Ni_(3)N effectively facilitates hydrogen desorption for HER,increases the electrical conductivity for OER,and promotes the Na-ion storage intercalation process,while the VON substantially elevates the water dissociation kinetics for HER,accelerates the adsorption of OH*intermediate for OER and enhances the Na-ion surface adsorption storage *** to the excellent HER and OER performances of the CF/Ni_(3)N/VON electrode,an overall water splitting device denoted as CF/Ni_(3)N/VON//CF/Ni_(3)N/VON was not only assembled showing an operating voltage of 1.63 V at current density of 10 m A cm^(-2)but was also successfully self-powered by the assembled CF/Ni_(3)N/VON//CF/Na_(3)V_(2)(PO_(4))_(3) flexible sodium ion *** work will contribute to the development of efficient and cost-effective flexible integrated electrochemical energy devices.

关键词： Interstitial nitride Trifunctional electrode Heterointerface Alkaline water splitting Sodium ion battery

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快速制备不锈钢自支撑析氧催化剂的性能研究

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湖南大学学报（自然科学版） 2021年第6期48卷 45-51页

作者：李玉平熊图治韦晶晶 Balogun Muhammad-Sadeeq 湖南大学材料科学与工程学院湖南长沙410082

将304不锈钢网在含2 mol·L^(-1) Ni^(2+)的沸腾溶液中处理120 s,制得了催化析氧性能优异、能规模化生产的自支撑电催化剂(SS/Ni-OH2M-120s).该催化剂在10 mA·cm^(-2)电流密度下的过电位为214 mV,比未经处理的304不锈钢网降低约127 mV,... 详细信息

将304不锈钢网在含2 mol·L^(-1) Ni^(2+)的沸腾溶液中处理120 s,制得了催化析氧性能优异、能规模化生产的自支撑电催化剂(SS/Ni-OH2M-120s).该催化剂在10 mA·cm^(-2)电流密度下的过电位为214 mV,比未经处理的304不锈钢网降低约127 mV,在20 mA·cm^(-2)的电流密度下恒电位极化10 h后,催化性能没有出现明显变化,说明具有良好的稳定性.将其与Pt网电极组成全分解水装置,在1.61 V总分解电压下,便可以提供10 mA·cm^(-2)的电流密度,比Pt-Mesh//IrO_(2)/SS全分解水装置电压降低了0.23 V.

关键词：自支撑电催化剂快速制备析氧反应过电位全分解水催化剂

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磷掺杂和Ni-OH共改性不锈钢的析氢及全分解水性能研究

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湖南大学学报（自然科学版） 2020年第8期47卷 133-140页

作者：李玉平韦晶晶熊图治 Balogun Muhammad-Sadeeq 湖南大学材料科学与工程学院湖南长沙410082

高活性、低成本的高效双功能水分解电催化剂对实现可持续氢能源的有效转化和储存具有重要的意义.将不锈钢网进行盐酸腐蚀、浸泡、磷化得到一种一体化自支撑的双功能电催化剂.该催化剂在碱性介质中不论对析氢反应(Hydrogen Evolution Rea... 详细信息

高活性、低成本的高效双功能水分解电催化剂对实现可持续氢能源的有效转化和储存具有重要的意义.将不锈钢网进行盐酸腐蚀、浸泡、磷化得到一种一体化自支撑的双功能电催化剂.该催化剂在碱性介质中不论对析氢反应(Hydrogen Evolution Reaction,HER)还是析氧反应(Oxyogen Evolution Reaction,OER)均表现出优异的电催化性能,Tafel斜率分别为87.41 mV·dec^-1和90.1 mV·dec^-1,析氢反应和析氧反应的电流密度为10 mA·cm^-2时过电位分别为165 mV和240 mV.该催化剂可用作全分解水的双功能电极材料,在1.66 V的电压下实现10 mA·cm^-2的电流密度.

关键词：双功能电催化剂不锈钢网析氢反应析氧反应全分解水

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