JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 11
·110539
·
IF 4.386
Wen Xie,Wenxian Yang,Ping Xie,Wenjiang Xie
Polyaniline (PANI) has good electrical conductivity, diverse redox chemistry, and a unique doping/dedoping mechanism. Furthermore, the facile synthesis, controllable morphology, and the ability to grow in situ on substrates provide the impetus to obtain aqueous Zn-ion batteries (ZIBs) with PANI as a cathode. However, due to its poor redox reversibility in a near-neutral electrolyte environment, the resulting ZIBs have a rapid capacity drop, poor rate performance, and poor cycling stability. To improve the electrochemical performance of PANI cathodes in ZIBs, zinc ions are doped into PANI and incorporated with carbon nanotubes (CNTs) by one-step polymerization. The results show that the use of Zn-doped PANI and CNTs composites can enhance the conductivity and stability of PANI, and further improve the capacities, rate performances, and cycle life of the ZIBs. The battery assembled with an optimized PANI-based cathode exhibits a high specific discharge capacity of 156.7 mAh g−1 at 0.05 Ag−1, and excellent capacity retention of 95% after 800 charge/discharge cycles. Additionally, the Zn//PANI battery shows a promising energy density of 166.7 Wh kg−1, together with a power density of 111.2 W kg−1. Such Zn ion-doped PANI-CNTs cathode material may provide significant insight into future large-scale industrial production for Zn//PANI batteries.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
You Li,Weiming Chen,Shengkun Jia,Mulan Tang,Yuxin Zhai,Lulu Zhan,Weiyan Chen
For practical rechargeable aqueous zinc-ion batteries, the long-term cycling stability of the zinc anode remains significantly constrained by its low utilization efficiency and the persistent challenge of hydrogen evolution . This study demonstrates the fabrication of ultrathin zinc electrodes with a robust Zn (002) texture while ensuring an adequate supply of zinc metal for use as an anode material . This approach effectively suppresses the tendency of zinc atoms to undergo deposition transformation due to dislocation-induced phenomena. Compared to zinc foils with higher deposition amount, the ultrathin Zn anode exhibits enhanced resistance to dendrite growth and interfacial side reactions. Assembled symmetrical cells based on this ultra-thin Zn anode show a cycle life of 1750 h (1 mAcm −2 , 0.5 mAhcm − 2 ), maintaining stable cycling for over 100h even at a high depth of discharge (DOD) of 46.23%. Additionally, the full cell couple with V 10 O 24 exhibits a high initial capacity of 429.6 mAh g −1 and a capacity retention of 75.8% after 1000 cycles.
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Reaction Chemistry & Engineering
·
2024
·Vol. 10
·期 1
·214-223
·
IF 3.4
Weihao Xu,Xipo Ma,Pengbo Lyu,Zhenren Gao,Chunshuang Yan,Chade Lv
Aqueous zinc-ion batteries (AZBs) suffer from poor reversibility and limited lifespan due to parasitic side reactions and dendrite growth induced by active water. Although additives are widely used to address these issues by reducing the water content within the Zn-ion solvation sheaths, the strong interaction between the additives and Zn2+ causes poor de-solvation kinetics. Here, we propose a strategy that introduces an electron-withdrawing halogen group to reduce the polarity of the sugar additive. Theoretical simulations and experimental results demonstrate that a sucralose additive with optimal polarity can decrease the coordinated active water without hindering the de-solvation kinetics of Zn2+. This effectively regulates the overpotential and inhibits side reactions. Meanwhile, the additive can adsorb onto the surface of the Zn metal to modify the direction of zinc deposition and suppress dendrite growth. As a result, the Zn//Zn symmetric cell with the sucralose electrolyte additive exhibits an outstanding cycling life of 2400 h at a current density of 1 mA cm−2. Moreover, when coupled with the V2O5 cathode, the full battery also demonstrates excellent operational stability, achieving 4000 cycles with a retained capacity of 51.84%.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiaowei Guo,Yang Yuan,Shanshan Li,Jingwen Wang,Zhengyu Bai,Lin Yang
Owing to the unique geometric and electronic structure, design and synthesis of electrocatalysts with well defined heterointerfaces are essential for clean energy technologies, for instance water-splitting and Zn-air batteries. Herein, a bifunctional electrocatalyst assembled by Co/MnO nanoparticles and nitrogen doping double-sphere carbon (denoted as Co/MnO@N-DSC), was fabricated via a solvothermal and pyrolysis strategy. The Co/MnO@N-DSC catalysts exhibit an enhanced bifunctional oxygen electrocatalytic performance for Oxygen reduction reaction (ORR) (E 1/2 , 0.84 V vs . RHE) and oxygen evolution reaction (OER) (E onset , 1.54 V vs . RHE). As an air cathode catalyst, the Co/MnO@N-DSC-based Zn-air battery can afford prime performance, over the commercial noble-metal-based Zn-air battery. Theoretical calculation results indicate that the synergism of Co (111)/MnO (200) heterointerfaces can enhance charge transfer and provide extra electrons for the reaction processes. This work provides a promising manoeuvre to uplift bifunctional catalytic activity by increasing the synergy from heterointerfaces of transition-metal/metal oxide in oxygen electrocatalysis .
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Wang Zhao,Ping Li,Kun Han,Kaixuan Cui,Chunrong Liu,Qiwei Tan,Xuanhui Qu
Liquid metal battery (LMB) has raised extensive interest in the field of large-scale energy storage applications . The Zn-based LMB composed of inexpensive Zn and low-temperature electrolyte have proven to be feasible and promising. However, the low voltage plateau and coulombic efficiency still limit their practical application. Here we demonstrate a simple design Zn-based LMB, which consists of Zn 5 Sn 5 alloy as negative electrode , Bi as positive electrode and ZnCl 2 –LiCl–KCl molten salt with lower zinc chloride content as electrolyte. The battery can stably operate at a low temperature of 375 °C and exhibit a flat and high voltage plateau of 0.8–0.9 V. A high coulombic efficiency of over 96% can be achieved by optimizing the composition of electrolyte. Sn is added to yield a liquid negative electrode, and then the problem of Zn dendrites can be avoided. In addition to Zn, both Sn and Bi participate in the redox reaction , which contributes to a multiple redox reaction mechanism. The Zn-based liquid metal batteries with low temperature and high voltage will be a prospective choice for large-scale energy storage.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zihan Meng,Haopeng Cai,Haolin Tang
The development of low-cost and efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalyst is critical for widespread application of fuel cells and metal-air batteries. Herein, hierarchically structured porous carbon bifunctional electrocatalyst is synthesized by using soft template and metal organic framework (MOF) precursor. The as-obtained electrocatalyst exhibits superior catalytic activity due to its hierarchical porous architecture as well as high surface area (1539 m 2 g -1 ). For ORR, the prepared catalyst shows more positive activity, superior long-term stability and remarkable methanol tolerance compared with commercial Pt/C catalyst in alkaline condition. In addition, the reported catalyst also has a higher OER activity than commercial Pt/C catalyst in alkaline media. We further demonstrate that the catalyst also presents outstanding Zn-air battery performance.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 15
·7145-7157
·
IF 11.301
Jinling Xue,Yinshi Li,Jue Hu
It remains a major challenge to develop a facile method to prepare non-noble metal electrocatalysts with high activity and durability to drive the sluggish oxygen reduction reaction (ORR) for proton exchange membrane fuel cells (PEMFCs). Herein, a highly efficient bimetallic Zn/Fe@N-doped hierarchical porous carbon (Zn/Fe–N–C) catalyst derived from ZIF-8 and hemin (host–guest) was firstly reported by one-step thermal treatment. Fe2+ spatially separated by using the hemin guest in the ZIF-8 framework and hydrocarbon-branched chains form rich Fe–Nx active sites, and the evaporation of Zn2+ generates a highly porous structure in the Zn/Fe–N–C catalysts. Benefitting from this unique structure and composition, the resulting Zn/Fe2–N–C catalyst exhibits excellent ORR activities in both 0.1 M KOH (onset potential, Eonset = 1.08 V, and half-wave potential, E1/2 = 0.86 V vs. RHE) and 0.5 M H2SO4 media (Eonset = 1.04 V and E1/2 = 0.81 V), which are even comparable to those of the commercial Pt/C catalyst, and ranks among the top reported electrocatalysts. In addition, it also has outstanding long-term durability and good methanol resistance, much better than those of Pt/C in both acidic and alkaline media, which makes it one of the best non-noble alternatives of Pt-based catalysts for ORR electrocatalysis. This work highlights the potential to rationally design and fabricate high-performance ORR catalysts for fuel cell applications.
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高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Jihua Wang,Wenyue Dong,Bo Gao,Dajun Liu,Qian Duan
In this paper, four organic polymers of poly [(MMA) x - co -(NPMA) y - co -(CPMA) z ] and four zinc phthalocyanine (ZnPc) polymers of poly [(MMA) x - co -(NPMA) y - co -(ZnPc) z ] have been successfully synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization, where MMA is methyl methacrylate, NPMA is 3,3-diphenyl-8-methacryloxy-3H-naphtho [2,1-b]pyran, and CPMA is 3,4-dicyanophenyl methacrylate. The components of these polymers have been fully characterized by 1 H and 13 C NMR, FT-IR, Raman, XPS, UV–Vis, and photoluminescence (PL) spectroscopy. From PL spectra, poly [(MMA) x - co -(NPMA) y - co -(ZnPc) z ] polymers display strong fluorescence quenching by the energy transfer (ET) process between NPMA and ZnPc moieties. The third-order nonlinear optical (NLO) properties of poly [(MMA) x - co -(NPMA) y - co -(ZnPc) z ] polymers have been investigated by the Z-scan technique, and poly [(MMA) 168 - co -(NPMA) 5.2 - co -(ZnPc) 1.2 ] (Q4) showed the best NLO properties owing to the much stronger ET between NP and ZnPc units. Furthermore, it is essential to obtain doped poly (methyl methacrylate) (PMMA) films for practical application. The poly [(MMA) 168 - co -(NPMA) 5.2 - co -(ZnPc) 1.2 ]/PMMA film exhibited a higher nonlinear absorption coefficient of 61 × 10 −11 m/W and a lower limiting threshold of 0.19 J/cm 2 . The significantly enhanced NLO properties of poly [(MMA) 168 - co -(NPMA) 5.2 - co -(ZnPc) 1.2 ]/PMMA film compared with solution are attributed to the weaker aggregation effect in PMMA film. This research provides a promising molecular design strategy for high performance NLO materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Junyi Yin,Mingyan Li,Xiang Feng,Tianyi Cui,Weiyu Sun,Minghui Wang,Weichen Shi,Shujiang Ding,Yonghong Cheng,Xin Xu,Jianhua Wang
Rampant side reactions such as hydrogen evolution reaction (HER), corrosion and uncontrollable dendrite growth at anodes greatly impede the application of AZIBs . Herein, caprolactam (CPL) is employed as a crucial electrolyte medium to achieve the aim of highly reversible zinc anodes . CPL molecules exhibit a lower adsorption energy (−1.94 eV) than H 2 O and preferential binding with Zn anodes, resulting in a H 2 O-poor anode/electrolyte interface and an enhanced steric effect at the anode surface. This effect effectively hinders the contact between zinc metal and water molecules, consequently facilitating the uniform and controlled deposition of Zn 2+ . Furthermore, the combination between CPL and Zn 2+ contributes to the optimization of solvation structures. Consequently, Zn/Zn batteries with CPL additives realized more than 2100 h stable cycling life under 1 mA cm −2 and 1 mAh cm −2 . Moreover, Zn/Cu batteries with CPL additives achieved a reversible plating/stripping process for over 3000 cycles with high average CE of 99.4%. Besides, the assembled Zn/NH 4 V 4 O 10 full batteries using electrolyte of ZnSO 4 /CPL also exhibited excellent cyclic performance. The batteries yielded 77.1 mAh g −1 under the current density of 5 A g −1 after 1000 cycles. CPL demonstrates significant potential as a cost-effective and multifunctional electrolyte additive for achieving stable and reliable AZIBs.
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高影响因子
Journal of the American Chemical Society
·
2022
·
IF 16.383
Kang Zhao,Guilan Fan,Jiuding Liu,Fangming Liu,Jinhan Li,Xunzhu Zhou,Youxuan Ni,Meng Yu,Ying-Ming Zhang,Hui Su,Qinghua Liu,Fangyi Cheng
The hydrophobic internal cavity and hydrophilic external surface of cyclodextrins (CDs) render promising electrochemical applications. Here, we report a comparative and mechanistic study on the use of CD molecules (α-, β-, and γ-CD) as electrolyte additives for rechargeable Zn batteries. The addition of α-CD in aqueous ZnSO4 solution reduces nucleation overpotential and activation energy of Zn plating and suppresses H2 generation. Computational, spectroscopic, and electrochemical studies reveal that α-CD preferentially adsorbs in parallel on the Zn surface via secondary hydroxyl groups, suppressing water-induced side reactions of hydrogen evolution and hydroxide sulfate formation. Additionally, the hydrophilic exterior surface of α-CD with intense electron density simultaneously facilitates Zn2+ deposition and alleviates Zn dendrite formation. A formulated 3 M ZnSO4 + 10 mM α-CD electrolyte enables homogenous Zn plating/stripping (average Coulombic efficiency ∼ 99.90%) at 1 mA cm–2 in Zn|Cu cells and a considerable capacity retention of 84.20% after 800 cycles in Zn|V2O5 full batteries. This study provides insight into the use of supramolecular macrocycles to modulate and enhance the interface stability and kinetics of metallic anodes for aqueous battery chemistry.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Changlin Li,Shangrong Chen,Yanfang Wang,Zhongyu Hou
ZnO nanorod arrays (NRAs) grown on the Zn foil substrate in the dual alkaline solution by hydrothermal method were first successfully utilized for photoelectrochemical (PEC) water splitting. ZnO NRAs were sufficiently covered on the Zn foil substrate via the reasonable match of the pH value, reaction temperature and reaction time through intensive experimental works. To enhance PEC performance, ZnS was coated on the surfaces of ZnO NRAs by ion exchange. The morphological, structural, optical and PEC characteristics of as-grown ZnO NRAs and ZnO/ZnS heterostructures were investigated. Compared with the pristine smooth and hexagonal ZnO NRAs, the surfaces of ZnO/ZnS heterostructures become rough and rounded in shape. Through the sulfidation treatment, some ZnO/ZnS heterostructures with a diameter of no more than 60 nm break and fade away, leading to a decrease in number density of ZnO/ZnS heterostructures. The texture coefficients of (002) diffraction peaks of ZnO decrease from 2.32 to 2.158. ZnO/ZnS heterostructures exhibit efficient separation rate of electron-hole pairs and enhanced visible light absorption, and thus have higher photocurrent density and photoconversion efficiency. In the polysulfide electrolyte solution , ZnO/ZnS heterostructures show good stability.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Kun Qian,Zhengjun Yao,Haiyan Lin,Jintang Zhou,Azhar Ali Haidry,Tongbaihui Qi,Wenjing Chen,Xinlu Guo
Nanocrystalline Ni–Zn ferrites with different neodymium contents (Ni 0.5 Zn 0.5 Nd x Fe 2-x O 4 ) were synthesized by sol-gel route combined with self-propagating combustion (SPC) method. The presence of surface functional groups, crystal structure and morphology of the samples were studied by FT-IR, XRD and SEM. The results show that the prepared samples are composed of spinel phase under the condition of low neodymium content, like the pure Ni–Zn ferrite. While neodymium oxide appears after the content of Nd 3+ exceeds a certain limit (x > 0.04) and there exist two phases in the ferrite. The results of vibrating sample magnetometer (VSM) and vector network analyzer (VNA) show that adjusting the content of Nd is significant in improving the dielectric properties and microwave absorption capacity of the materials, specifically at low frequencies. When x < 0.04, the enhancement of dielectric loss ability of spinel ferrites by doping Nd 3+ is the dominant factor affecting microwave absorption ability of samples. The secondary phase Nd 2 O 3 hardly appears under this condition, thus the weakening effect of Nd 3+ addition on magnetic loss ability is not obvious. When x = 0.04, the optimal absorption peak of the material reaches −20.8 dB at 4.4 GHz with a thickness of 8.5 mm and the effective absorption bandwidth (R L < −10 dB) was 3.2 GHz. On the contrary, when x > 0.04, the magnetic loss ability decreases rapidly (e.g., Ms decreases from 82.47 emu/g to 59.77 emu/g). Meanwhile, the dielectric loss increases slowly and the microwave absorption capacity decreases.
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高影响因子
危险品化学品经营许可证（带存储）