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| 1 | NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions显示文摘Water splitting,as an advanced energy conversion technology,consists of two half reactions,including oxygen evolution reaction(OER)and hydrogen evolution reaction(HER).However,the ideal electrocatalysts are noble metal based catalysts.Their high cost and scarcity in earth seriously restrict the large deployments.Ni Fe-based materials have attracted great attention in recent years due to their excellent catalytic properties for OER and HER.Nevertheless,their conductivity and electrochemical stability at high current density are unsatisfactory,resulting in ineffective water splitting due to high impedance and low stability.Recently,a series of catalysts coating Ni Fe-based materials on 3 D nickel foam were found to be extremely stable under the circumstance of high current density.In this review,we summarized the recent advances of NiFe-based materials on nickel foam for OER and HER,respectively,and further provided the perspectives for their future development. | Wei Zhang Daohao Li Longzhou Zhang Xilin She Dongjiang Yang | 2019 | Journal of Energy Chemistry2019，28，12： | 6 |
| 2 | Bamboo-inspired cell-scale assembly for energy device applications显示文摘Rapid advances in flexible and wearable smart textiles demand low-cost,high-energy/power-density fiber-shaped supercapacitors(FSCs).The performance of FSCs is determined by the fabrication and assembly of fiber-shaped electrodes(FSEs),where an active charge-storage material is always clad around flexible charge transmission current collectors.Inspired by the tissue structure of natural bamboo,wherein parenchyma cells(PCs)that store nutrients are clad around bamboo fibers(BFs),we propose a strategy for converting bamboo cells into FSEs using conductive BFs and activated PCs as current collectors and active materials,respectively.The assembled electrode has a high specific capacitance of 1454 mF cm^(−2) at 0.64 mA cm^(−2).A solid-state FSC with a pair of bamboo-structured electrodes exhibited a substantially high energy density.Its mechanical flexibility enabled the knitting of wearable wristbands to drive ultra-small voltmeter indicators.This lightweight,low cost,and high-energy-density bamboostructured FSC could enable numerous smart textile applications. | Qiuqin Lin Runan Gao Daohao Li Yun Lu Shiqin Liu Yanglun Yu Yuxiang Huang Wenji Yu | 2022 | npj Flexible Electronics2022，6，1： | 1 |
| 3 | Quasi-Three-Dimensional Cyclotriphosphazene-Based Covalent Organic Framework Nanosheet for Efficient Oxygen Reduction显示文摘Metal-free carbon-based materials are considered as promising oxygen reduction reaction(ORR)electrocatalysts for clean energy conversion,and their highly dense and exposed carbon active sites are crucial for efficient ORR.In this work,two unique quasi-three-dimensional cyclotriphosphazene-based covalent organic frameworks(Q3CTP-COFs)and their nanosheets were successfully synthesized and applied as ORR electrocatalysts.The abundant electrophilic structure in Q3CTP-COFs induces a high density of carbon active sites,and the unique bilayer stacking of[6+3]imine-linked backbone facilitates the exposure of active carbon sites and accelerates mass diffusion during ORR.In particular,bulk Q3CTP-COFs can be easily exfoliated into thin COF nanosheets(NSs)due to the weak interlayerπ-πinteractions.Q3CTP-COF NSs exhibit highly efficient ORR catalytic activity(half-wave potential of 0.72 V vs.RHE in alkaline electrolyte),which is one of the best COF-based ORR electrocatalysts reported so far.Furthermore,Q3CTP-COF NSs can serve as a promising cathode for Zn-air batteries(delivered power density of 156 mW cm-2 at 300 mA cm^(-2)).This judicious design and accurate synthesis of such COFs with highly dense and exposed active sites and their nanosheets will promote the development of metal-free carbon-based electrocatalysts. | Jianhong Chang Cuiyan Li Xiaoxia Wang Daohao Li Jie Zhang Xiaoming Yu Hui Li Xiangdong Yao Valentin Valtchev Shilun Qiu Qianrong Fang | 2023 | Nano-Micro Letters2023，15，9： | 1 |
| 4 | Li 3 V 2 (PO 4 ) 3 nanocrystals embedded in a nanoporous carbon matrix supported on reduced graphene oxide sheets: Binder-free and high rate cathode material for lithium-ion batteries显示文摘 | Xianhong Rui Daohao Sim Kangming Wong Jixin Zhu Weiling Liu Chen Xu Huiteng Tan Ni Xiao Huey Hoon Hng Tuti Mariana Lim Qingyu Yan | 2012 | Journal of Power Sources2012，，： | 1 |
| 5 | Template-free synthesis of urchin-like Co 3 O 4 hollow spheres with good lithium storage properties显示文摘 | Xianhong Rui Huiteng Tan Daohao Sim Weiling Liu Chen Xu Huey Hoon Hng Rachid Yazami Tuti Mariana Lim Qingyu Yan | 2013 | Journal of Power Sources2013，，： | 1 |
| 6 | In situ synthesis of FeS/Carbon fibers for the effective removal of Cr(Ⅵ)in aqueous solution显示文摘Iron sulfide(FeS)nanoparticles(termed FSNs)have attracted much attention for the removal of pollutants due to their high efficiency and low cost,and because they are environmentally friendly.However,issues of agglomeration,transformation,and the loss of active components limit their application.Therefore,this study investigates in situ synthesized FeS/carbon fibers with an Fecarrageenan biomass as a precursor and nontoxic sulfur source to ascertain the removal efficiency of the fibers.The enrichment of sulfate groups as well as the double-helix structure in i-carrageenan-Fe could effectively avoid the aggregation and loss of FSNs in practical applications.The obtained FeS/carbon fibers were used to control a Cr(Ⅵ)polluted solution,and exhibited a relatively high removal capacity(81.62 mg/g).T he main mechanisms included the reduction of FeS,electrostatic adsorption of carbon fibers,and Cr(Ⅲ)-Fe(Ⅲ)complexation reaction.The pseudo-second-order kinetic model and Langmuir adsorption model both provided a good fit of the reaction process;hence,the removal process was mainly controlled by chemical adsorption,specifically monolayer adsorption on a uniform surface.Furthermore,co-existing anions,column,and regeneration experiments indicated that the FeS/carbon fibers are a promising remediation material for practical application. | Rongrong Zhang Daohao Li Jin Sun Yuqian Cui Yuanyuan Sun | 2020 | Frontiers of Environmental Science & Engineering2020，14，4： | 0 |
| 7 | Hierarchically Porous and Defective Carbon Fiber Cathode for Efficient Zn‑Air Batteries and Microbial Fuel Cells显示文摘Developing low-cost,efficient oxygen reduction reaction(ORR)catalysts to replace Pt-based materials is urgently required for the application of Zn-air batteries(ZABs)and microbial fuel cells(MFCs).In this work,meso-microporous carbon fibers with tunable defect density were synthesized by carrageenan fibers.A highly defective carbon fiber(HDCFs)was produced which exhibited an outstanding ORR catalytic activity,reaching to the half-wave potential of 0.841 and 0.44 V in alkaline and neutral electrolytes,respectively.These HDCFs can also act as highly efficient air cathodes for ZABs(delivered potential of 0.69 V and power density of 220 mW cm^(–2) at 300 mA cm^(–2))and MFCs(high power density of 69.7 mW cm^(–2)).Simulation by the density functional theory indicated that a high density of defections in a carbon based framework can remarkably modulate the electrical properties.For instance the charge entrapments in the carbon active sites may reduce the energy barrier of ORR. | Daohao Li Xiaojing Long Yaqian Wu Huijie Hou Xueyao Wang Jun Ren Lijie Zhang Dongjiang Yang Yanzhi Xia | 2022 | Advanced Fiber Materials2022，4，4： | 0 |
| 8 | Dynamic investigation of oxygen defects on transition metal-based electrocatalysts:formation,characterization,and mechanism during alkaline oxygen evolution reaction显示文摘Oxygen defects play a critical role in the electrocatalytic oxygen evolution reaction(OER).Therefore,in-depth understanding the structure-activity-mechanism relationship of these defects is the key to design efficient OER electrocatalysts.This relationship needs to be understood dynamically due to the potential for irreversible phase transitions during OER.Consequently,significant efforts have been devoted to study the dynamic evolution of oxygen defects to shed light on the OER mechanism.This review critically examines and analyzes the dynamic processes occurring at oxygen defect sites during OER,including defect formation and defect evolution mechanisms,along with the advanced characterization techniques needed to understand these processes.This review aims to provide a comprehensive understanding of high-efficiency electrocatalysts,with a particular emphasis on the importance of in situ monitoring the dynamic evolution of oxygen defects,providing a new perspective towards efficient OER electrocatalyst design. | Rongrong Zhang Qilong Wu Peter Sherrell Daohao Li Keke Huang Jun Chen Xiangdong Yao | 2023 | Science China Chemistry2023，66，8： | 0 |
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