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From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： zhonghua Lu Jun Shen Xin zhang Lingcong Chao Liang Chen Ding zhang Tao Wei Shoudong Xu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

Self-healing Ga-based liquid metal/alloy anodes for rechargeable batteries

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Nano Research 2024年第3期17卷 1366-1383页

作者： Meijia Song zhonghua zhang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212000China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China

With the rapid development of electronics,electric vehicles,and grid energy storage stations,higher requirements have been put forward for advanced secondary *** metal/alloy electrodes have been considered as a promising development direction to achieve excellent electrochemical performance in metal-ion batteries,due to their specific advantages including the excellent electrode kinetics and self-healing ability against microstructural electrode *** conventional liquid batteries,high temperatures are needed to keep electrode liquid and ensure the high conductivity of molten salt electrolytes,which also brings the corrosion and safety ***-based metal/alloys,which can be operated at or near room temperature,are potential candidates to circumvent the above *** this review,the properties and advantages of Ga-based metal/alloys are ***,Ga-based liquid metal/alloys as anodes in various metal-ion batteries are reviewed in terms of their self-healing ability,battery configurations,working mechanisms,and so ***,some views on the future development of Ga-based electrodes in batteries are provided.

关键词： metal-ion batteries Ga-based liquid metal/alloy anodes self-healing capability room temperature

Two-Phase Image Segmentation by the Allen-Cahn Equation and a Nonlocal Edge Detection Operator

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Numerical Mathematics(Theory,Methods and Applications) 2022年第4期15卷 1147-1172页

作者： zhonghua Qiao Qian zhang Department of Applied Mathematics The Hong Kong Polytechnic UniversityHung HomHong KongSARChina Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomHong KongSARChina School of Science Harbin Institute of TechnologyShenzhenChina

Based on a nonlocal Laplacian operator,a novel edge detection method of the grayscale image is proposed in this *** operator utilizes the information of neighbor pixels for a given pixel to obtain effective and delicate edge *** nonlocal edge detection method is used as an initialization for solving the Allen-Cahn equation to achieve two-phase segmentation of the grayscale *** exponential time differencing(ETD)solvers are employed in the time integration,and finite difference method is adopted in space *** maximum bound principle and energy stability of the proposed numerical schemes are *** capability of our segmentation method has been verified in numerical experiments for different types of grayscale images.

关键词： Image segmentation Allen-Cahn equation nonlocal edge detection operator maximum principle energy stability

Liquid metal assisted regulation of macro-/micro-structures and mechanical properties of nanoporous copper

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Science China(Technological Sciences) 2021年第10期64卷 2229-2236页

作者： zhang Ying BAI QingGuo YANG WanFeng zhang zhonghua Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Nanoporous metals have received significant attention as a new class of structural and functional ***,the macroscopic brittle fracture under the tensile test is an impediment to their practical ***,it is of central importance to develop nanoporous materials with low cost and high tensile ***,a nanoporous Cu film supported on a pure Cu substrate(NPC@Cu)was fabricated by utilizing a liquid Ga assisted alloying-dealloying strategy,and the thickness of NPC film can be precisely regulated by changing the mass loading of liquid ***-situ X-ray diffraction was performed to further explore the alloying/dealloying *** NPC@Cu films show good tensile mechanical properties with a minimum elongation of 13.5%,which can be attributed to the good interface bonding and certain modulus matching between the nanoporous Cu layer and the Cu *** findings demonstrate that the design of film-substrate structure provides a feasible strategy for enhancing the mechanical properties of nanoporous metals.

关键词： nanoporous metals dealloying mechanical properties in-situ X-ray diffraction structural regulation

Molecular dynamics simulation for aggregation phenomena of nanocolloids

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Science China(Technological Sciences) 2009年第2期52卷 484-490页

作者： NI zhonghua zhang XinJie School of Mechanical Engineering Southeast UniversityNanjing 210096China

Nonequilibrium molecular dynamics (MD) method was used to study the dielectrophoresis (DEP) motion of nanocolloids in non-uniform electric field. By changing the electric field strength and system temperature, aggregation phenomena of nanocolloids was analyzed. Simulation results showed that at normal temperature, though the Brownian force can affect the motion of colloids, the attractive force will increase quickly with the distance between colloids down to 12σ , which makes colloids aggregate. When the Brownian force is weak to colloid's motion, for the enhancement of electric field strength, the DEP force of colloid will increase and so did the attractive force, which finally quickens the aggregate speed. Simulation results also showed that the temperature' enhancement will increase the Brownian force of colloids, hence disturbing the colloids aggregation. Moreover, the DLVO theory was used to study the motion of a pair of interactional colloids, both the potential energy and the attractive force versus distance of colloids were presented, then the latter graph was used to compare with another graph elicited by MD method. Results showed that the two graphs were nearly the same, indicating the MD model accorded with the theory.

关键词： MD DEP nanocolloid aggregation DLVO theory

Dealloying induced nanoporosity evolution of less noble metals in Mg ion batteries

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Journal of Magnesium and Alloys 2021年第6期9卷 2122-2132页

作者： Jiazheng Niu Meijia Song Ying zhang zhonghua zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061P.R.China

Rechargeable Mg ion batteries(MIBs)have aroused great interests,and using alloy-type anodes and conventional electrolytes offers an effective way to develop high energy density Mg battery ***,the dealloying-induced nanoporosity evolution of alloy-type anodes during the charging process has received less ***,using a magnetron-sputtered Mg;Bi;film as an example,we investigate its electrochemical dealloying and associated structural evolution in an all-phenyl-complex electrolyte by in-situ and ex-situ *** microstructures and length scales of nanoporous Bi can be facilely regulated by changing electrochemical parameters,and there exists a good linear correlation between the surface diffusivity of Bi and the applied current density/potential scan rate on a logarithm *** importantly,the self-supporting nanoporous Bi electrodes deliver satisfactory Mg storage performance and alloy-type anodes show good compatibility with conventional ***,the charging-induced dealloying in MIBs is a general strategy to fabricate nanoporous less noble metals like Sn,Pb,In,Cu,Zn and Al,which shows advantages over chemical dealloying in aqueous *** findings highlight the significance of nanoporosity evolution of alloy-type anodes during dealloying,and open opportunities for the fabrication of nanoporous reactive metals.

关键词： Mg ion batteries Alloy-type anodes Dealloying Nanoporous metals Surface diffusivity

Nanoporous black silver film with high porosity for efficient solar steam generation

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Nano Research 2023年第4期16卷 5610-5618页

作者： Bin Yu Yan Wang Ying zhang zhonghua zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022China

Given the challenges brought by the shortage of freshwater resources,solar water evaporation has been regarded as one of the most promising technologies for harnessing abundant sunlight to harvest clean water from the *** metals have attracted extensive attention in solar water evaporation due to their localized surface plasmon resonance effect,but highly porous metallic films with high evaporation efficiency are ***,a self-supporting black nanoporous silver(NP-Ag)film was fabricated by dealloying of an extremely dilute Al99Ag1 *** choice of the dilute precursor guarantees the formation of the NP-Ag film with high porosity(96.5%)and low density(0.3703 g·cm^(-3),even smaller than the lightest metal lithium).The three-dimensional ligament-channel network structure and the nanoscale(14.6 nm)of ligaments enable the NP-Ag film to exhibit good hydr.philicity and broadband absorption over 200‒2,500 *** importantly,the solar evaporator based on the NP-Ag film shows efficient solar steam generation,including the efficiency of 92.6%,the evaporation rate of 1.42 kg·m^(-2)·h^(-1)and good cycling stability under one sun ***,the NP-Ag film exhibits acceptable seawater desalination property with the ion rejection for Mg^(2+),Ca^(2+),K^(+)and Na^(+)more than 99.3%.Our findings could provide a new idea and inspiration for the design and fabrication of metal-based photothermal films in real solar evaporation applications.

关键词： photothermal materials nanoporous silver surface plasmon resonance solar steam generation seawater desalination

Self-Supporting Nanoporous Copper Film with High Porosity and Broadband Light Absorption for Efficient Solar Steam Generation

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Nano-Micro Letters 2023年第7期15卷 57-71页

作者： Bin Yu Yan Wang Ying zhang zhonghua zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061People’s Republic of China School of Materials Science and Engineering University of JinanWest Road of Nan Xinzhuang 336Jinan 250022People’s Republic of China

Solar steam generation(SSG)is a potential technology for freshwater production,which is expected to addr.ss the global water shortage *** noble metals with good photothermal conversion performance have received wide concerns in SSG,while high cost limits their practical applications for water ***,a self-supporting nanoporous copper(NP-Cu)film was fabricated by one-step dealloying of a specially designed Al_(98)Cu_(2)precursor with a dilute solid solution ***-situ and ex-situ characterizations were performed to reveal the phase and microstructure evolutions during *** NP-Cu film shows a unique three-dimensional bicontinuous ligament-channel structure with high porosity(94.8%),multi scale-channels and nanoscale ligaments(24.2±4.4nm),leading to its strong broadband absorption over the 200–2500 nm wavelength More importantly,the NP-Cu film exhibits excellent SSG performance with high evaporation rate,superior efficiency and good *** strong desalination ability of NP-Cu also manifests its potential applications in seawater *** related mechanism has been rationalized based upon the nanoporous network,localized surface plasmon resonance effect and hydr.philicity.

关键词： Solar steam generation Nanoporous copper Broadband solar absorption Localized surface plasmon resonance Seawater desalination Dealloying

Three-dimensional nitrogen and phosphorous Co-doped graphene aerogel electrocatalysts for efficient oxygen reduction reaction

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Science China Chemistry 2018年第5期61卷 592-597页

作者： Jizhen Ma zhonghua Xiang Jintao zhang Key Laboratory for Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical EngineeringShandong University State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

The development of efficient electrocatalysts for oxygen reduction reaction(ORR) is of importance for fuel cells and metal-air batteries. Herein, three-dimensional nitrogen and phosphorous co-doped graphene aerogel(NPGA) was prepared via the pyrolysis of polyaniline(PANi) coated graphene oxide aerogel synthesized by oxidative polymerization of aniline on graphene oxide(GO) sheets in the presence of phytic acid. The uniform coating of PANi thin layer on the surface of GO sheets enables the formation of highly porous composite aerogel of PANi and GO. The subsequent thermal treatment is able to prepare the porous NPGA due to the carbonization of PANi and phytic acid as nitrogen and phosphorous resources. When used as electrocatalysts,the as-prepared NPGA electrocatalysts exhibited good catalytic activity to ORR via an efficient four-electron pathway with good stability, benefiting from the highly porous structure and the heteroatom co-doping. More importantly, Zn-air batteries operated in ambient air have been fabricated by coupling a Zn plate with the NPGA electrocatalyst in an air electrode, demonstrating the maximal power density as high as ~260 W/g and a good long-term stability with slightly potential decay for over 450 h. The facile method for preparing efficient carbon based ORR electrocatalysts would generate other potential applications including fuel cells and others.

关键词： graphene aerogel heteroatom doping oxygen reduction reaction Zn-air battery