JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jingchen Luo,Xinyi Zhou,Yingxia Dong,Na Jiang,Qiaoji Zheng,Dunmin Lin
Transition-metal sulfides boast a high theoretical capacity and have been regarded as a kind of prospective electrodes for supercapacitors; nevertheless, their inherent poor conductivity and low electrochemical active sites limit the practical applications of the materials. Herein, flower-like zinc cobalt sulfide (ZCS) microspheres with rich sulfur vacancies (ZCS δ ) have been synthesized by a three-step procedure of hydrothermal, post-annealing and room-temperature sulfuration treatments. The flower-like microspheres self-assembled by ultrathin nanosheets bring the active material fully contact with electrolyte, facilitating ion diffusion during charging and discharging. Furthermore, defect engineering of sulfur vacancies at the atomic level raises the intrinsic conductivity and increases active sites for electrochemical reactions. As a result, the obtained sulfur-deficient ZCS microspheres possess an excellent specific capacitance of 2709 F g −1 at 1 A g −1 and an exceptional cycling lifespan of maintaining 90.9% of the initial capacitance over 3000 cycles. In addition, the hybrid supercapacitor employing (HSC) sulfur-deficient flower-like ZCS microspheres as the positive electrode present a high energy density of 28 Wh kg −1 at the power density of 800 W kg −1 . This investigation proposes an efficient strategy to significantly and synergistically enhance the electrochemical performance of the electrodes for hybrid supercapacitor by the comprehensive engineering of defect and morphology.
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
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Le Xu,Yukun Xi,Xiaojun Sun,Pusu Zhao,Fengxia Zhu,Jingzhou Yin,Luyang Chen,Junhua Hu,Xifei Li
Rational design of the electrode materials in distinctive architecture and tailored composition is critical for regulating their electrochemical properties . Herein, the novel porous zinc-cobalt sulfides (ZCS) bead-curtain-like arrays (BCA) supported by three-dimensional Ni foam (NF) (denoted as ZCS/NF BCA) are fabricated as advanced electrode for supercapacitors (SCs), which exhibit remarkable electrochemical performances in respect of superb capacity of ~837 C g −1 (specific capacitance of ~1860 F g −1 ) at 1 A g −1 and ultra-long cycling stability (~92.9% retention after 5000 cycles at 6 A g −1 ). Furthermore, the assembled hybrid supercapacitors based on ZCS/NF BCA delivers ultrahigh energy density of ~88 Wh kg −1 with a maximum power density of ~800 W kg −1 . The excellent properties may be ascribed to the combined contributions from the hierarchical bead-curtain architecture of ZCS/NF BCA composite and the bimetallic sulfide with abundant valence states for rich redox reactions .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yanhui Liang,Qian Liu,Yonglan Luo,Xuping Sun,Yuquan He,Abdullah M. Asiri
In this paper, we report the use of Zn 0.76 Co 0.24 S/CoS 2 nanowires array on Ti mesh (Zn-Co-S/TM) topotactically derived from ZnCo 2 O 4 nanowires array precursor as a durable and efficient bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalyst in strongly alkaline media. This Zn-Co-S/TM electrode drives 20 mA cm −2 at 238 mV HER overpotential and 20 mA cm −2 at 330 mV OER overpotential. The corresponding two-electrode alkaline water-splitting system achieves 10 mA cm −2 at a cell voltage of 1.66 V.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xing Yu,Weiwei Zhang,Lu Liu,Yves Fautrelle,Xionggang Lu,Xi Li
The abundant mass and charge transfer involved in Faradaic redox reactions are largely determined by microstructures including the surface area and porosity, elemental composition and electrical conductivity of bimetallic sulfides. Here, a high magnetic field (HMF) was introduced to tune these intrinsic characters for superior supercapacitor electrodes. We developed a novel HMF-controlled anion-exchange methodology to prepare the one-dimensional (1D) bunched Zn–Co–S yolk–shell balls (ZCS6T BYSBs). The HMF-induced directional growth and alignment of Zn0.76Co0.24S drive the directional 1D assembly. The as-obtained ZCS6T BYSBs possess larger surface area/pore volume, higher crystallinity and electrical conductivity, richer electroactive elements, and favorable axial electron and ion transport because of HMF-enhanced favorable ion diffusion and exchange kinetics. Flexible S, N codoped carbon nanotubes/graphene films embedded with the ZCS6T BYSBs (CZS6T/CNTs/SNGS) were fabricated by vacuum filtration and one-step S, N codoping and reduction of graphene oxides to improve structural stability and charge transport. The CZS6T/CNTs/SNGS electrode displayed impressive enhanced specific capacitance and rate capability with 78.7% capacitance retention at 30 A g–1. Furthermore, the CZS6T/CNTs/SNGS//CNTs/SNGS asymmetric supercapacitor delivered remarkable cycling stability with a high energy density of 41.1 W h kg–1 at a large power density of 9022 W kg–1.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Dandan Han,Ping Wang,Yupeng Dang,Feng Zhu,Dongxu Wang,Zexiang Shen,Yen Wei
The transformation of metal-organic frameworks (MOFs) into customizable metal compounds with tailored pore structures is considered an effective approach for enhancing electrical conductivity as electrode materials. However, conventional MOF conversion methods often involve intricate high-temperature reactions, posing challenges in precisely controlling the composition, pore structure, and active sites of MOF-derived energy storage materials. Here, we propose a novel electrochemical conversion method for MOFs to be converted into cobalt-based bimetallic sulfides, thereby improving the low conductivity of MOFs and inheriting a porous skeleton for high-energy water-based charge storage. The extent of MOF transformation was assessed using X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy at varying Ar + etching depths. Consequently, a zinc-cobalt sulfide (ZnCoS/NF) on highly porous nickel foam can be engineered for water-phase supercapacitor energy storage. Furthermore, the electrode exhibits a specific capacity of 566.5 mAh·g −1 at 1 A·g −1 and demonstrates excellent operational stability under large current fluctuations. Additionally, hybrid supercapacitors coupled with ZnCoS//AC can deliver a maximum energy density of 56.9 Wh·g −1 and a power density of 232.4 W·kg −1 .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 48
·12584-12591
·
IF 5.16
Kai Tao,Xue Han,Qiuhui Cheng,Yujing Yang,Zheng Yang,Qingxiang Ma,Lei Han
Graphical MOF-templated electrode : A porous zinc cobalt sulfide nanosheet array on Ni foam (Zn-Co-S/NF) was constructed by growing 2D zinc/cobalt-based metal–organic framework (Zn/Co-MOF) nanosheets on NF, followed by additional sulfurization (see figure). The Zn-Co-S/NF nanosheet array was used directly as a supercapacitor electrode and showed much better electrochemical performance than zinc cobalt sulfide powder. An asymmetric supercapacitor was assembled from Zn-Co-S/NF and activated carbon electrodes, and its potential for practical application was demonstrated by driving a red LED. Porous ternary metal sulfide integrated electrode materials with abundant electroactive sites and redox reactions are very promising for supercapacitors. Herein, a porous zinc cobalt sulfide nanosheet array on Ni foam (Zn-Co-S/NF) was constructed by facile growth of 2D bimetallic zinc/cobalt-based metal–organic framework (Zn/Co-MOF) nanosheets with leaf-like morphology on NF, followed by additional sulfurization. The Zn-Co-S/NF nanosheet array acted directly as a supercapacitor electrode showing much better electrochemical performance (2354.3 F g −1 and 88.6 % retention over 1000 cycles) when compared with zinc cobalt sulfide powder (355.3 F g −1 and 75.8 % retention over 1000 cycles), which originates from good electrical conductivity and mechanical stability, abundant electroactive sites, and facilitated transportation of electrons and electrolyte ions due to the unique nanosheet array structure. An asymmetric supercapacitor (ASC) device assembled from Zn-Co-S/NF and activated carbon electrodes can deliver a highest energy density of 31.9 Wh kg −1 and a maximum power density of 8.5 kW kg −1 . Most importantly, this ASC also shows good cycling stability (71.0 % retention over 10000 cycles). Furthermore, a red LED can be powered by two connected ASCs, and thus as-synthesized Zn-Co-S/NF has great potential for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Fuming Wu,Jianping Gao,Xiangang Zhai,Minhui Xie,Chunjuan Gao,Yu Sun,Yu Liu,Jing Yan
In this work, hierarchical zinc cobalt sulfide flowers on nickel foam (f-Zn 0.76 Co 0.24 S/Ni foam) are fabricated by a facile two-step hydrothermal method . The obtained f-Zn 0.76 Co 0.24 S/Ni foam are directly used as the binder-free electrodes for high-performance supercapacitors. The as-prepared f-Zn 0.76 Co 0.24 S/Ni foam exhibite a high specific capacitance of 1906 F g −1 at a current density of 1 A g −1 and good rate performance. The excellent electrochemical performance can be attributed to the unique interconnected flower structure, which provides a path for the rapid diffusion of electrolyte ions. Moreover, the f-Zn 0.76 Co 0.24 S/Ni foam//Fe 2 O 3 @rGO asymmetric supercapacitor is assembled. It can achieve a high energy density of 75.7 Wh kg −1 at a power density of 700.5 W kg −1 and display superior cycling stability with 86.7% retention after 8000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yulong Cao,Jiaheng Wang,Linzhi Zhong,Jie Zhou,Anchun Fang,Qingwei Wang,Yang Zhao,Jiarui Li,Jiaxu Gong,Yatang Dai
The imperative for supercapacitors with elevated energy densities in contemporary energy storage applications is addressed by leveraging the high redox potential and theoretical capacitance of transition metal sulfides (TMSs). Despite their promise, TMSs often confront challenges such as diminished electrical conductivity and substantial volumetric expansion, which can degrade performance. This manuscript details the synthesis of ZnCoS nanosheets via a hydrothermal sulfurization process of ZnCo-MOF precursors, followed by the precise electrodeposition of ZnCo-LDH to form a uniformly dense outer layer, yielding a core-shell structured ZnCoS/ZnCo-LDH composite. This architecturally distinct core-shell configuration has been meticulously engineered to transcend the electrochemical limitations of its constituent materials, manifesting in an enhanced specific capacity of 248.9 mA h g −1 (2240 F g −1 ) at a current density of 1 A g −1 , and an exemplary capacity retention of 77.9 % post 5000 cycles. Furthermore, the ZnCoS/ZnCo-LDH//AC asymmetric supercapacitor, integrated with activated carbon (AC) as the anodic material, achieves an energy density of 36.4 Wh kg −1 at a notable power density of 850 W kg −1 . Upon advancement to a quasi-solid-state flexible supercapacitor configuration, the device sustains the rotation of a miniature windmill, underscoring its prospective utility within energy storage systems.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Jing Zhao,Shuangyue Hou,Yongqing Bai,Yue Lian,Qiuping Zhou,Chaolei Ban,Zhifeng Wang,Huaihao Zhang
Transition metal sulfides have attracted much attention in recent years due to their high theoretical specific capacitance and conductivity. In this work, the two-layer heterogeneous metal sulfides (Zn-Co-S) were prepared successfully using the zinc-cobalt fund organic framework as a sacrificial template. The composite materials were characterized by a variety of means and its performance as electrode material for supercapacitor was also tested in detail. Resultantly, the 2L-ZnCoS (two layers of Zn-Co-S) has good electrochemical properties: its specific capacitance is up to 971.01 C g −1 at the specific current of 1 A g −1 with 90.3% retention after 10,000 cycles. As for the asymmetric supercapacitor 2L-ZnCoS//AC assembled with 2L-ZnCoS as positive electrode and activated carbon as negative electrode, it showed excellent performance: when the power density was 0.80 kW kg −1 and 8.09 kW kg −1 , the energy density were as high as 51.76 Wh kg −1 and 31.63 Wh kg −1 correspondingly. This advanced performance is due to its unique double-layer hollow structure and the synergistic effect, which are helpful to acquire more electrochemical active sites and transport pathways to accelerate ion transport. Accordingly, the well-designed double-layer hollow composite sulfide is an ideal electrode material for high performance supercapacitors .
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 35
·2504553
·
IF 19
Yifan Zhang,Jingyu Guo,Xiao Liu,Yujie Gao,Zhongchao Bai,Nana Wang,Yunxiu Wang,Fuyi Jiang,Yanjun Zhai,Shi Xue Dou,Caifu Dong
Developing stable material structures and modulating electronic structures is a good strategy for improving metal-sulfide electrode conductivity, reducing volume change, and enhancing the reaction kinetics of Na + electrodes to achieve stable electrochemical performance. However, it continues to be challenging to create hybrid structures with precisely defined architectures and desired compositions. Thus, the carbon-coated Zinc/Cobalt sulfide heterostructure nanorods (ZnS/CoS@C) are prepared by sulfidation treatment of the Zinc/Cobalt binary metal–organic framework in one step. As expected, ZnS/CoS@C heterostructure displayed an ultra-long lifespan (403 mAh g −1 at 10 A g −1 over 1700 cycles) and superior rate performance (653.1/333.3 mAh g −1 at 0.5/30 A g −1 ). The kinetic analysis and Density functional theory calculations show that the excellent electrochemical performance is attributed to the high pseudocapacitive and fast kinetic behavior. The Na-ion storage mechanism of ZnS/CoS@C is revealed by in X-ray diffraction, ex situ X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. Furthermore, the full cells of ZnS/CoS@C//Na 3 V 2 (PO 4 ) 3 @rGO are successfully assembled and demonstrated impressive performance (186.3 mAh g −1 at 0.5 A g −1 for 600 cycles). This study offers an easy way to design heterostructured anode materials for superior sodium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 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）