JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 7
·1-13
·
IF 2.8
Yu Haichao,Chen Xuan,Zhou Jie,Wang Hui
Zn-ion hybrid capacitors (ZIHCs) have been deemed a promising candidate for energy storage equipment to overcome the primary drawback of supercapacitors—low energy density. Herein, inspired by the laminated structure of chitin fibrils, molten salt strategy is proposed to engineer functional carbon as cathode material for ZIHCs, for the first time. Orthogonal design was adopted to ascertain the optimum synthetic conditions for the chitin-derived NaCl-templated and NaNO 3 -activated carbons (CNNs). The resultant C2NN1-800-1-5 possesses high surface area of 1256 m 2 g −1 and rich surface heteroatom content of 11.3 at%, as well as numerous thin intertwined nanofibre bundles. Associated with the synergy of surface capacitive reaction and diffusion battery behavior, the Zn//ZnSO 4 ( aq , 2 M)//C2NN1-800-1-5 ZIHC can be conducted in a relatively broad potential window ranging from 0 to 1.8 V and manifests remarkable energy density of 133.4 Wh kg −1 at 180 W kg −1 . Moreover, charge/discharge cycling further revealed that this device can retain 100% of its initial capacity, together with almost 100% coulombic efficiency after 10,000 cycles at 6 A g −1 . The study emphasizes the green synthesis of heteroatom-doped hierarchical porous carbon cathode material, notably facilitating the rapidly increasing popularity of Zn-ion hybrid energy storage devices.
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POLYHEDRON
·
2023
·
IF 2.6
Mengyun Chen,Rong Shao,Qiongqiong Wang,Yan Gao,Ye Ma,Rongfeng Guan,Tao Yang
Metal-organic framework (MOF) fluorescent materials have significant advantages in detecting organic pollutants and metal ion pollution. A zinc metal organic framework nanofiber fluorescent membrane (Zn(Eu)-MOF@PAN NFM) was prepared by doping the lanthanide metal Eu using an electrospinning and impregnation process. The structure and morphology of the membrane was characterized by SEM, XRD, FT-IR and XPS. The results show that the membrane has good fluorescence performance and can successfully and efficiently detect nitrobenzene (NB; detection limit = 0.861 ppm, K sv = 0.143 ppm −1 ), 4-nitrophenol (4-NP; detection limit = 0.631 ppm, K sv = 0.178 ppm −1 ), benzaldehyde (BA; detection limit = 0.981 ppm, K sv = 0.051 ppm −1 ) and Fe 3+ ions (detection limit = 3.418 ppm, K sv = 3.210×10 −3 ppm −1 ) in solution. In terms of repeatability and stability, the test results are obviously better than the property of the powder.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiajia Guo,Syed Comail Abbas,Hai Huang,Zifeng Hua,Md Manik Mian,Shilin Cao,Xiaojuan Ma,Yonghao Ni
Developing highly efficient, sustainable carbon cathodes is essential for emerging Zn-ion hybrid supercapacitors (ZICs). Herein, lignin's novel chemical modification (amination) has been developed to produce high quantity pyrrolic-N moieties as active sites. Furthermore, chemically modified amine moieties in lignin are vital as a natural self-activating template to generate hierarchical porosity in the 2D (graphene-like) architecture with exceedingly high surface area (2926.4 m 2 g −1 ). The rationally introduced dominated pyrrolic-N moieties boost the Zn-ion storage capacity and reaction kinetics due to the dual energy storage mechanism and efficient charge transfer between pyrrolic-N and Zn +2 ions. Furthermore, the pyrrolic-N species are energetically favorable for the adsorption of Zn +2 ions by the formation of N -Zn +2 chemical bonds. Besides, the nitrogen oxides reduce the intrinsic resistance and induce a more polarized surface, resulting in high wettability and efficient transfer of electrolytes into the pores of hydrophobic carbon materials . Subsequently, the chemically modified lignin-derived activated carbon material (Chem-ACM) as a cathode in ZICs delivers a high capacity of 161.2 mA h g −1 at 1 A g −1 with the admirable energy density of 106.7 W h kg −1 at 897 W kg −1 and excellent retention capacity (94%) after 10,000 cycles. Mainly, the assembled quasi solid-state ZICs using Chem-ACM retains the remarkable storage capacity (202 mA h g −1 at 0.2 Ag −1 ) even at a high bending angle. Notably, the Chem-ACM has been further employed in symmetric supercapacitors as an electrode, and it displays exceptional specific capacitance of 354 Fg −1 at 0.5 Ag −1 with tremendous energy (43.5 W h kg −1 ) and the power density (0.53 kW kg −1 ). Additionally, the charge storage capability of Chem-ACM is positively dependent on high nitrogen contents, and it is extrapolated that pyrrolic-N moieties are dominant active sites. Hence, the designed amination-assisted biocarbon synthesis provides a new way to prepare high nitrogen-containing biocarbon for ZICs and further understand pyrrolic-N species' impact on Zn-ion storage.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yeshuang Wang,Xuan Liu,Mingxian Duan,Chaonan Zhang,Huiling Fan,Chao Yang,Tingting Jiao,Tian Kou,Ju Shangguan
Isoreticular bimetal M−Cu−BTC has considerable potential in improving the sulfides removal performance of Cu–BTC. Herein, three transition metals, namely, Zn 2+ , Ni 2+ and Co 2+ , were assessed to fabricate M−Cu−BTC, a desirable isoreticular bimetal. Results demonstrated the feasibility of using Zn 2+ to fabricate an isoreticular bimetallic Zn–Cu–BTC. The Zn 2+ doping content of Zn–Cu–BTC was varied to investigate its influence on the hydrogen sulfide (H 2 S) and methyl sulfide (CH 3 SCH 3 ) removal performance of Cu–BTC. The experimental results indicated that the sulfides removal performance of Zn–Cu–BTC increased and then decreased with increasing Zn doping content. The highest H 2 S and CH 3 SCH 3 removal capacities of 84.3 and 93.9 mg S/g, respectively, were obtained when the Zn 2+ doping content was 17%. The hybridisation of Zn and Cu in Zn–Cu–BTC induced a strong interaction between them. This interaction increased the binding energies of H 2 S and CH 3 SCH 3 towards the Cu and Zn adsorption sites while weakening the bond order between Zn and Cu. The weakened bond order made the Zn–Cu bonds easier to form metal sulfides during desulfurization process, thereby synergistically enhancing sulphide removal.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qianqun Xu,Lijuan Peng,Kaifen Luo,Jiahuan Zhong,Chengkai Zhang,Dingsheng Yuan
A flexible solid rechargeable Zn-air battery for advanced energy conversion and storage has extensive applications in portable electric sources, wildlife rescue and flexible wearable systems. Herein, the CoSe 2 nanoparticles anchored on cobalt-embedded N -doping carbon nanoplates (CoSe 2 /CoNC) is developed as a highly active bifunctional catalyst via pyrolysis and selenization of bimetallic zeolitic imidazolate frameworks containing Zn and Co. The introduction of inactive Zn generates strong electrochemically active surface areas due to the synergistic effect between CoSe2 nanoparticles and CoNC matrix. Further, CoSe2/CoNC exhibits prominent Zn–air battery performance and even outperforms the commercially available noble-metal catalysts. Notably, a high-rate flexible Zn-air battery enabled by an alkaline composite polyacrylic acid-carboxymethyl cellulose electrolyte delivers the open-circuit potential of 1.51 V. The battery offers high wearability and performs very well under various conditions, such as soaking, drilling and sewing.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 29
·13697-13702
·
IF 3.3
Qiuyuan Feng,Jianyi Zuo,Hong Du
A novel congruent melting compound Cs2Zn4V4O15 has been synthesized by conventional high-temperature solid-state reactions. The compound crystallizes in the monoclinic system, C2/c (No. 15) space group, with a = 15.724(4) Å, b = 5.3548(15) Å, c = 20.921(6) Å, β = 102.572(11)°, V = 1719.3(8) Å3, Z = 4. It is a cesium zinc vanadate with [VO4] units and [V2O7] dimers, which construct the final three-dimensional framework by binding to a one-dimensional zinc oxide chain. In addition, the optical properties and thermal stability of the compound have been studied, and the relationship between the structure and properties has been analyzed through first-principles calculations.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Quan Zhang,Kang Lian,Qian Liu,Gaocan Qi,Shusheng Zhang,Jun Luo,Xijun Liu
High entropy alloys (HEAs) are those metallic materials that consist of five or more elements. Compared with conventional alloys, they have much more catalytic active sites due to unique structural characteristics such as high entropy effect and lattice distortion, endowing them with promising applications in the region of hydrolysis catalysts. Herein, we successfully loaded high-entropy alloys onto carbon nanotubes (FeNiCoMnRu@CNT) by hydrothermal means. It exhibits excellent HER and OER properties in alkaline seawater. To accomplish two-electrode total water splitting when constructed into Zn air cells, it only needed 1.6 V, and the timing voltage curve showed a steady current density of 10 mA cm −2 during constant electrolysis for more than 30 h in alkaline seawater. The remarkably high HER and OER activity of FeNiCoMnRu@CNT HEAs NPS indicates the potentially broad application prospect of HEAs for Zn air battery.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lechen Diao,Wei Zhou,Biao Zhang,Chunsheng Shi,Zhichao Miao,Jin Zhou,Chunnian He
Developing highly efficient, low-cost, and stable bifunctional oxygen electrocatalysts is essential for the wide popularization of rechargeable Zn-air batteries. Combining zero-dimensional metal nanoparticles with two-dimensional metal oxide nanosheets is an appealing strategy to balance performance and cost. However, the precise construction of these composites remains a great challenge, and their interaction mechanisms lack thorough study. Herein, a cobalt-oxide-based bifunctional oxygen electrocatalyst comprising a rich Co-CoO heterointerface (CoO/Co@NG) was synthesized via a NaCl sealing-assisted pyrolysis strategy. The NaCl crystals played the role of a closed nanoreactor , which facilitated the formation of a CoO-Co heterojunction . Experimental results and theoretical calculations confirmed that the ingeniously constructed heterojunction expedited the oxygen reduction reaction and oxygen evolution reaction kinetics, which is superior to Pt/C. When serving as the air electrode in an assembled liquid-state Zn-air battery , the battery shows high power density (215 mW cm −2 ), specific capacity (710 mAh g zn −1 ), and outstanding durability (720 h at 10 mA cm −2 ). This work provides an innovative avenue to design high-performance heterojunction electrocatalysts for perdurable Zn-air batteries.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 37
·2302293
·
IF 19
Xuyan Ni,Jinqiu Zhou,Haoqing Ji,Yuejiao Chen,Huaming Yu,Yiwei Zheng,Tao Qian,Mengfan Wang,Libao Chen,Chenglin Yan
The side reactions related to water are the major issue hindering practical application of Zn metal batteries. To exclude the trouble from interfacial water, a covalent organic polymer (COP) layer with N, N′-Bis(salicylidene)ethylenediamine structure is designed, whose strong coordination ability with Zn 2+ enhances the de-solvation kinetics of solvated Zn 2+ which is conducive to interfacial water removal thus alleviating the side reactions related to water. This function has been certified by density functional theory along with molecular dynamics analysis. Moreover, measurements including in situ electrochemical gas chromatography, in situ optical microscopy, in situ X-ray diffraction and in situ Raman spectroscopy verify the weakened side reactions (including hydrogen evolution and corrosion) along with homogenous Zn deposition contributed from the covalent organic polymer layer. Benefiting from these merits, when assemble into cells based on common ZnSO 4 -based aqueous electrolyte, the COP layer-decorated anode exhibits excellent electrochemical performance of a high average Coulombic efficiency value 99.5% at a high capacity of 5.0 mA h cm −2 . What's more, the symmetric cells can operate at −20 °C and the full cell with N/P ratio as low as 1.2 can cycle stably for 100 cycles, which would carry forward the promising practical application of Zn metal batteries.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiaofeng Zhang,Muhammad Sufyan Javed,Syed Shoaib Ahmad Shah,Fahim Ahmed,Iftikhar Hussain,Fatimah M. Alzahrani,Norah S. Alsaiari,Sayed M. Eldin,Mohd Zahid Ansari,Weihua Han
Transition-metal oxides are a class of promising pseudocapacitive materials for high energy density supercapacitors, while their low intrinsic conductivity and remarkable volume expansion deteriorate the electrochemical properties. Herein, we develop a binder-free mesoporous architecture supported on a carbon cloth (CC) substrate based on the nitrogen (N)-doped and oxygen vacancy (Ov)-rich zinc cobalt oxide nanosheets (denoted by N-Ov-ZCO@CC). Because of the instructive synergy of doping, defect, and surface engineering achieved by N-functionalization, the N-Ov-ZCO@CC exhibits significantly enhanced electrochemical properties. The N-Ov-ZCO@CC single electrode exhibited a high capacitance of 2166.4 F/g at 1 A/g with superb rate-capability (91.2% at 20 A/g) and superior cycling stability of 98.99% up to 5,000 cycles. In addition, a zinc-ion hybrid supercapacitor (ZHSC) device, assembled with the N-Ov-ZCO@CC as the cathode and Zn-foil as the anode, shows a high energy density of 95.35 Wh/kg at the power density of 10,008 W/kg, superior to most state-of-the-art ZHSCs. This work provides an effective strategy for constructing multifunctional electrochemical energy materials for ZHSCs.
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Journal of Energy Storage
·
2023
·
IF 9.4
Yang Yang,Ruiying Wang,Shanliang Chen,Lan Jiang,Qiao Liu,Lin Wang,Weiyou Yang,Feng Hu,Weijun Li
In the present work, we report the exploration of rationally designed electrodes based on quasi-aligned nanoarrays composited by the cores of SiC nanowires and shells of sulfur-doped porous carbons (SiC@PC-S), which are directly employed as the free-standing electrodes for Zn-ion hybrid supercapacitors . They behave an ultrahigh areal capacitance of 38.24 mF/cm 2 at a scan rate of 10 mV/s, with an exceptional rate capability (~20.67 mF/cm 2 even at 1000 mV/s). The as-constructed hybrid supercapacitors deliver a remarkable energy of 10.6 μWh/cm 2 , which is the highest one among SiC-based supercapacitors ever reported. Moreover, such hybrid devices exhibit a high power density of 7.2 mW/cm 2 and a robust cycle stability with ~97 % capacitance retention after 5000 cycles at 2 mA/cm 2 , representing their promising practical applications.
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MOLECULES
·
2022
·Vol. 27
·期 23
·8572
·
IF 4.927
Wanning Xiong,Jie Ouyang,Xiaoman Wang,Ziheng Hua,Linlin Zhao,Mengyao Li,Yuxin Lu,Wei Yin,Gonggang Liu,Cui Zhou,Yongfeng Luo,Binghui Xu
Transition metal oxides (TMOs) can provide high theoretical capacitance due to the change of multiple valence states of transition metals. However, their intrinsic drawbacks, including poor electrical conductivity, lower energy density, and huge volume expansion, will result in the pulverization of electrode materials and restricted electrochemical kinetics, thus leading to poor rate capability and rapid capacity fading. Composite electrodes based on transition metal oxides and carbon-based materials are considered to be promising candidates for overcoming these limitations. Herein, we reported a preparation method of hybrid ZIFs derived Zn-doped Co3O4/carbon (Zn-Co3O4/C-230) particles semi-embedded in wood-derived carbon skeleton for integrated electrodes. A large specific surface area, excellent conductivity, and electrochemical stability provide a larger electrochemical activity and potential window for the electrode. Prepared Zn-Co3O4@CW-230 electrode (0.6 mm thick) displays ultrahigh area specific capacitances of 7.83 and 6.46 F cm−2at the current densities of 5 and 30 mA cm−2, respectively. Moreover, a symmetric supercapacitor assembled by two identical Zn-Co3O4@CW-230 electrodes delivers a superior area-specific capacitance of 2.61 F cm−2at the current densities of 5 mA cm−2and great energy densities of 0.36 mWh cm−2(6.0 mWh cm−3) at 2.5 mW cm−2, while maintaining 97.3% of initial capacitance over 10,000 cycles. It notably outperforms those of most carbon-based metal oxides, endowing the Zn-Co3O4@CW-230 with extensive prospects for practical application.Keywords:semi-embedding;transition metal oxides;hybrid ZIFs;wood-derived carbon;supercapacitors
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