Batteries-Basel
·
2023
·Vol. 9
·期 5
·262
·
IF 4
Dezhi Kong,Qingwei Zhang,Lin Li,Huimin Zhao,Ruixin Liu,Ziyang Guo,Lei Wang
Aqueous zinc-ion batteries (ZIBs) have received much attention because of their high safety, low pollution, and satisfactory energy density (840 mAh g−1), which is important for the research of new energy storage devices. However, problems such as short cell cycle life and low coulombic efficiency (CE) of zinc (Zn) anodes due to disorderly growth of Zn dendrites and side reactions of hydrogen corrosion have delayed the practical application of ZIBs. In this work, a new “self-growth” method is proposed to build a robust and homogeneous three-dimensional (3D) nanoporous structure of tin (Sn)-coated Zn anodes (ZSN) in just 10 min by a simple and fast reaction, which can largely raise the surface area of the electrode plate. The ZSN not only provides abundant Zn nucleation sites, but also reduces the corrosion current, thus alleviating the self-corrosion of the electrolyte, reducing the occurrence of hydrogen precipitation side reactions, and effectively inhibiting the growth of Zn dendrites during cycling. Thus, a symmetric cell with a ZSN anode can be stabilized with very low voltage hysteresis (30 mV) for 480 h of stable plating/stripping cycles and can operate well for 200 h even at high current densities of 10 mA cm−2. Supercapacitors and button cells were assembled, respectively, to verify the performance of ZSN electrodes in different energy storage tools. The ZSN||AC supercapacitor exhibited superior capacity (75 mAh g−1) and high reversibility (98% coulombic efficiency) at a current density of 2 A g−1. With a MnVO (MVO) electrode as the cathode, the ZSN||MVO full cell presents excellent cycling stability with a capacity retention of 95.4% after 500 cycles at 2 A g−1, which far exceeds that of the bare Zn cell.Keywords:nanoporous anode;aqueous Zn-based battery;dendrite-free;3D metal versatile protective layer
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 3
·925
·
IF 3.748
Weihua Chen,Jiancheng Tang,Peidong Cheng,Yunlong Ai,Yi Xu,Nan Ye
2D layered MXene (Ti3C2Tx) with high conductivity and pseudo-capacitance properties presents great application potential with regard to electrode materials for supercapacitors. However, the self-restacking and agglomeration phenomenon between Ti3C2Txlayers retards ion transfer and limits electrochemical performance improvement. In this study, a 3D porous structure of Ti3C2Txwas obtained by adding alkali to a Ti3C2Txcolloid, which was followed by flocculation. Alkaline-induced flocculation is simple and effective, can be completed within minutes, and provides 3D porous networks. As 3D porous network structures present larger surface areas and more active sites, ions transfer accelerates, which is crucial with regard to the improvement of the superior capacitance and rate performance of electrodes. The sample processed with KOH (K-a-Ti3C2Tx) exhibited a high capacity of approximately 300.2 F g−1at the current density of 1 A g−1. The capacitance of the samples treated with NaOH and LiOH is low. In addition, annealing is essential to further improve the capacitive performance of Ti3C2Tx. After annealing at 400 °C for 2 h in a vacuum tube furnace, the sample treated with KOH (K-A-Ti3C2Tx) exhibited an excellent specific capacitance of approximately 400.7 F g−1at a current density of 1 A g−1, which is considerably higher than that of pristine Ti3C2Tx(228.2 F g−1). Furthermore, after 5000 charge–discharge cycles, the capacitance retention rate reached 89%. This result can be attributed to annealing, which can further remove unfavourable surface groups, such as –F or –Cl, and then improve conductivity capacitance and rate performance. This study can provide an effective approach to the preparation of high-performance supercapacitor electrode materials.Keywords:Ti3C2Tx;alkaline treatment;annealing treatment;3D porous structure;supercapacitors
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zexiang He,Deshun Huang,Guozong Yue,Jing Zhu,Pengxiang Zhao
Three-dimensional (3D) porous MXene gel (MXene-Ca) was synthesized through a fast gelation of Ti 3 C 2 T x MXene nanosheets initiated by calcium ions. The MXene-Ca showed efficient phosphate adsorption ability through the strong chemical reaction between Ca 2+ and phosphate with a fast adsorption equilibrium (within 2 min). Furthermore, the recovered P/MXene-Ca gel after phosphate sorption could be used for adsorption of uranium in aqueous solution. Various analysis including SEM, TEM, XRD, XPS, FT-IR, BET surface area and zeta potential were carried out to fully characterize the materials. Increased specific surface area of the 3D porous structure and the formation of newly active adsorption sites of hydroxyapatite in P/MXene-Ca gel, are two main factors promoting the removal of U(VI). The maximum adsorption capacity was 823.6 mg/g at 298 K by Langmuir isotherm model. Kinetic studies disclosed that the of U(VI) followed the major chemical adsorption process. Overall results from batch experiments, leaching experiments, and characterizations demonstrated that the main mechanisms of the U(VI) removal by P/MXene-Ca including chemical adsorption on hydroxyapatite via dissolution precipitation and surface complexation with the oxygen-containing functional groups of MXene.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Yuexiu Du,Xiaowei Chi,Jiaqi Huang,Qiliang Qiu,Yu Liu
Aqueous rechargeable Zn batteries are attractive for emerging generations of large-scale energy storage due to their high safety, low cost, and high energy density . It is regrettable that the poor cycling performance limits its further commercialization due to the troublesome dendrite growth and short-circuiting issue of the traditional planar Zn anode. Herein, in this work, a three-dimensional porous Zn anode (3D ZnP/CF) composed of highly conductive carbon fiber-based network and active zinc powder fillers is designed for long lifespan aqueous Zn batteries . The new 3D ZnP/CF exhibits controlled deposition behavior and scarce short-circuiting benefiting from the fast ionic/electronic transfer and sufficient deposition space, which are enabled by the porous structure and conducting network of the anode. The symmetric cell based on 3D ZnP/CF exhibits small voltage hysteresis of 25.1 mV and extraordinarily long cycling stability of 3000 h, particularly excellent high-rate performance (8 mA cm −2 , 8 mA h cm −2 , 700 h), which is superior to those of the reported static Zn metal batteries. Furthermore, the assembled full cell with manganese oxide as cathode exhibits superb capacity retention of 93.2% over 7000 cycles. The structural and compositional design provides another effective approach for the commercialization of aqueous rechargeable Zn batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Dong-Yang Zhang,Ning Zhang,Peng Song,Jing-Yi Hao,Yi Wan,Xiao-Hui Yao,Tao Chen,Long Li
In the present study, porous magnetic cellulose beads (CBs) were prepared and further modified using amines. The CBs appeared to have good spherical shape and three-dimensional (3D) porous structure. In the adsorption tests, the modified cellulose beads (MCBs) showed better adsorption capacities and shorter adsorption times on hyperin and 2′-O-galloylhyperin than the commercial resins. The adsorption may be due to the hydrogen bonding between the target compounds and the amine groups of MCBs. After adsorption and desorption, the contents of hyperin and 2′-O-galloylhyperin reached 1.32% and 3.92%, which were 4.08 and 4.23 times higher than those in the Pyrola extracts. Therefore, the prepared MCBs in this study make an excellent adsorbing material of hyperin and 2′-O-galloylhyperin, and it may have potential for the separation of other natural compounds.
研究领域:
材料科学
·
天然产物化学
·
药用植物研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Kaiqiang Dong,Kaijie Xu,Ningsi Wei,Yanyuan Fang,Zhiyong Qin
Three-dimensional porous sodium alginate/gellan gum aerogels (SAG aerogels) were prepared by the method of freeze-drying and ion cross-linking for the removal of methylene blue (MB) in wastewater. The physical morphology and chemical structure of the SAG aerogels were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The results revealed that the addition of gellan gum (GG) formed interpenetrating double network structures by ion cross-linking and hydrogen bonding interaction with sodium alginate (SA), which improved the chemical resistance of SAG aerogels and the adsorption capacity of aerogel for MB at a mass ratio of 3:1. The pseudo-second-order kinetic model and Langmuir isothermal model could be used to describe the adsorption process of MB, and the maximum adsorption capacity of the SAG aerogel for MB was 1456.45 mg/g, at 313 K. The adsorption thermodynamic analysis results showed that the adsorption process of MB was spontaneous and exothermic. After 5 adsorption-desorption cycles, the adsorption capacity of SAG aerogel only decreased 1.44% compared with their initial adsorption capacity. The obtained results indicated that the SAG aerogels could be successful and effective used to remove the MB in wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2021
·
IF 3.626
Gaoqi Tian,Shiwei Wu,Zhongli Chen,Yang Cao,Jinchun Tu,Xinlong Tian,Wei Huang,Jieqiong Wang,Lei Ding
The major challenges of replacing noble-metal electrocatalysts for hydrogen evolution reaction and oxygen evolution reaction in alkaline electrolytes are stability- and kinetics-related. Here we report the synthesis of MoNi 4 electrocatalysts covered by MoO 2 nanosheets on carbon cloth. Originating from the high intrinsic catalytic activity of MoNi 4 nanoalloy, the 3D porous structure provides many exposed active sites and high conductivity. The sample exhibited high activity with an overpotential of 23 mV and 253 mV, a low Tafel slope of 47 mV dec −1 and 136 mV dec −1 at a current density of 10 mA cm −2 for HER and OER, respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bohan Liu,Jun Nan,Ruixue Jiang,Fangmin Wu,Langrun Song,Zhencheng Ge,Xuesong Ye,Xinhui Zhang,Wei Wang
Excessive phosphorus (P) emission from sewage to water bodies is still a global challenge that threatens environmental safety. Here, La-based aerogel beads (LCM) with a lanthanum (La) complex core were prepared via crosslinking to serve as a novel P scavenger. The chelation of the central La active sites with the alginate ligand to form complexes made the LCM beads stable in water. La active sites, as the core of LCM, existed high dispersibility in the surface and interior of the aerogel beads, which made it exhibit high utilization of La active sites and a high P/La molar ratio (P/La: 2.80), which was 2 ∼ 10 times that of other La-loaded adsorbents. Due to the high dispersion of La active sites, LCM achieved a high adsorption capacity of 624.57 mg P/g La. Besides, the LCM beads also achieved a high mass transfer efficiency due to the unique three-dimensional porous structures of the beads. Apart from the excellent P capture performance of the LCM aerogel beads, the physicochemical properties of LCM facilitated their separation from the treatment water and subsequent regeneration, making this a promising adsorbent for P uptake from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10557-10566
·
IF 4
Biao Zhang,Ying Yang,Jingliang Cai,Xiaolong Hou,Caini Yi,Xuan Liao,Yuping Liu,Changguo Chen,Danmei Yu,Xiaoyuan Zhou
As a promising supercapacitor electrode material, NiMn-LDH has attracted great attention due to its high theoretical capacity and easy preparation. However, the development and application of NiMn-LDH in supercapacitors are limited because of its poor cycling stability and low electrical conductivity. To solve these problems, a NiMnMg-LDH with a three-dimensional porous morphology has been successfully fabricated by doping with Mg to improve its electrochemical properties. Experimental results indicate that NiMnMg-LDH-7 delivers a specific capacitance of 1772 F g−1 at a current density of 1 A g−1. Moreover, it can still reach 1080 F g−1 when the current density is increased 10 times, suggesting excellent rate capability. The asymmetric supercapacitor (ASC) NiMnMg-LDH-7//AC can provide a high energy density of 28 W h kg−1 at a power density of 700 W kg−1. Furthermore, the energy density can still reach 16 W h kg−1 even if the power density is increased to close to 3500 W kg−1. The capacity retention of this ASC device can reach 74% after 3000 cycles at a current density of 3 A g−1. These excellent properties of NiMnMg-LDH can be attributed to the obvious improvement of its specific surface area and electrical conductivity owing to doping with the element magnesium. We believe that this work could provide a new idea for the preparation of high-performance electrode materials for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2019
·Vol. 12
·期 1
·188
·
IF 2.972
Kaicheng Zhang,Guobing Ying,Lu Liu,Fengchen Ma,Lin Su,Chen Zhang,Donghai Wu,Xiang Wang,Ying Zhou
Ti3C2Txand Ti3C2Tx-NiO composites with three-dimensional (3D) porous networks were successfully fabricated via vacuum freeze-drying. The microstructure, absorption, and electrochemical properties of the developed composites were investigated. Nickel oxide (NiO) nanoparticles could be evenly distributed on the three-dimensional network of three-dimensional Ti3C2Txusing solution processing. When employed as electrochemical capacitor electrodes in 1 M environmentally friendly sodium sulfate, Na2SO4, solution, the three-dimensional porous Ti3C2Tx-NiO composite electrodes exhibited considerable volume specific capacitance as compared to three-dimensional porous Ti3C2Tx. The three-dimensional porous Ti3C2Tx-NiO composite delivered a remarkable cycling performance with a capacitance retention of up to 114% over 2500 cycles. The growth trend of the capacitance with NiO content shows that nickel oxide plays a crucial role in the composite electrodes. These results present a roadmap for the development of convenient and economical supercapacitors in consideration with the possibilities of morphological control and the extensibility of the process.Keywords:MXene;porous Ti3C2Tx-NiO composite;freeze-drying;electrode;supercapacitor
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 97
·94682-94686
·
IF 3.289
Li Liu,Jie Zhao,Wei-Hua Li,Xiao-Ying Zhang,Hui-Zhong Xu,Kai Li,Yan Kai,Li-Shui Sun,Chao-Qin Li,Fa-Qian Liu
An effective strategy to improve the conductivity of MnO2-based electrodes is to combine them with some conductive materials, such as metal or carbon-based materials. In this work, Ag nanoparticles decorated MnO2/Sulfonated Graphene composite with 3D macroporous structure (3D Ag–MnO2/SG) was synthesized and their performance as electrode material in supercapacitors was studied. The improved conductivity and the elaborate design of 3D porous structure allowed the 3D Ag–MnO2/SG electrode to possess enhanced electrochemical performance. For example, the electrochemical testing results demonstrated that the 3D Ag–MnO2/SG presents a capacitance of 537 F g−1 at 0.5 A g−1, which is much higher than that of MnO2 (∼172 F g−1). Moreover, the 3D Ag–MnO2/SG electrode delivers a higher capacity retention rate in high current density and smaller charge transfer resistance than that of MnO2, which is contributed by the synergistic effect from the Ag nanoparticles and the 3D porous SG.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2019
·
IF 8.013
Xuefeng Zhang,Xudong Liu,Shangli Dong,Jianqun Yang,Yong Liu
MXene is a promising material for supercapacitor due to its unique physical and chemical properties. However, traditional fabrication methods of electrode often result in restacking of MXenes nanosheets, leading to the insufficient utilization of electrochemical performance. Therefore, it is a great challenge in actual applications for us to improving the restacking of electrode materials by designing optimum electrode structures. Herein, we reported a fabrication of 3D macroporous MXenes film (3d-Ti 3 C 2 T x -film) and aerogel by liquid nitrogen rapid freezing. The specific area increased by 5 and 22 times compared with the Ti 3 C 2 T x -film (prepared by vacuum filtered and dried in air). The huge specific surface area enhances double-layer capacitance and provides more surface active sites. The specific capacitance of 3d-Ti 3 C 2 T x -film and aerogel is 372 F g −1 (1355 F cm −3 ) and 404 F g −1 (1293 F cm −3 ) at a current density of 1 A g −1 in a 3 M H 2 SO 4 electrolyte, respectively. Moreover, the supercapacitor fabricated with 3d-Ti 3 C 2 T x -film displays an outstanding volumetric energy density of 32.2 Wh L −1 at the power density of 946 W L −1 . The fabrication method by liquid nitrogen rapid freezing is more environmental friendly, simpler and lower cost compared to the template method. Furthermore, the 3D macroporous MXene is expected to be applied in the fields of ion battery, seawater purification and photocatalysis.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）