Journal of Energy Storage
·
2025
·
IF 9.8
Junxi Long,Jinghao Zhang,Lingfeng Li,Yanxuan Wen,Xuetang Xu,Fan Wang
The rational design of self-supporting electrodes with high mass loading and optimized morphology is essential for achieving high-performance sulfide-based energy storage systems. Thiospinel sulfides, owing to their unique bimetallic synergistic effects and superior electrical conductivity, represent promising candidates for advanced supercapacitor electrode materials. However, the precise control of hierarchical architectures at high mass loading remains challenging due to the limited solubility and distinct precipitation behaviors of various metal cations within thiospinel sulfides. To address the aforementioned challenges, a novel differential deposition strategy was employed to synthesize NiCo-based sulfide nanorod arrays with both high mass loading and diverse hierarchical structures in this work. Specifically, an open-porous CoNi 2 S 4 nanosheet arrays was first deposited on carbon cloth (CC) via ethanol/thioacetamide-assisted solvothermal synthesis. Subsequently, hydrothermal deposition facilitated epitaxial growth of CoNi 2 S 4 nanorods with minimized lattice mismatch, thereby strengthening bimetallic interactions. The as-obtained CoNi 2 S 4 nanorod arrays (6.61 mg cm −2 ) on carbon cloth exhibits an exceptional areal capacity of 5.12C cm −2 at 5 mA cm −2 and gravimetric capacity of 711C g −1 at 1 A g −1 , with good rate performance. Furthermore, the assembled CoNi 2 S 4 -EW//AC hybrid supercapacitor (HSC) shows a high areal capacitance of 1.41 F cm −2 at 5 mA cm −2 , an energy density of 0.64 mWh cm −2 at 9 mW cm −2 , and outstanding long-term cycling stability (retaining 84.6 % of its capacitance after 20,000 cycles). This work proposes a universal deposition strategy for the practical design and regulation of NiCo sulfide electrodes at high mass loading levels.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 27
·9346-9355
·
IF 4
Qihang Chen,Wenna Zhao,Zihao Huang,Guochang Li,Kai Tao,Lei Han
Binary transition metal sulfides are considered to be a promising material for supercapacitors, possessing richer electrochemically active sites and superior electrochemical performance. Metal–organic frameworks (MOFs) are often used as self-sacrificing templates in the preparation of metal sulfides. Usually, direct sulfidation of MOFs tends to cause collapse of the morphological structure and blockage of the ion transport channels, so that the morphology of the original MOF template can be well preserved by using pyrolysis followed by S2− ion exchange. In this paper, we first prepared NiCo–MOF-74 on nickel foam by an in situ transformation method from layered double hydroxides (LDHs) through a ligand exchange reaction. Then, CoNi2S4 was synthesized in two steps involving the pyrolysis of NiCo–MOF-74 and a subsequent S2− ion exchange reaction. Compared with direct sulfidation, this synthetic strategy can well maintain the rod-like morphology of MOF-74 arrays and prevent structural collapse. The surface of CoNi2S4 has a fine nanosheet structure, which exposes more active sites and shows a high specific capacitance of 7.50 F cm−2 at 2 mA cm−2 and an excellent Coulomb efficiency (96.32%). In addition, the hybrid supercapacitor assembled with activated carbon shows a high energy density of 0.64 mW h cm−2 at a power density of 1.64 mW cm−2 and a high capacitance retention of 88.39% after 5000 cycles. These results indicate that rod-shaped CoNi2S4 can be controllably prepared from MOF-74 involving an exchange reaction and has promising application in high-performance 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
Journal of Energy Storage
·
2026
·
IF 10.7
Xing Chen,Wen Zhu,Yuan Chen,Xiaoying Chen,Meng Wang,Kun Xie,Xiaoyun Zhang,Xiang Wang,Yinyin Ran,Jia Li
Layered double hydroxides (LDHs) have garnered extensive interest for supercapacitors. However, their practical applications are hindered by low electrical conductivity, insufficient accessible electroactive sites, and proneness to agglomeration. Herein, zeolite imidazolate framework (ZIF)-derived tremella-like NiCo layered double hydroxide@CoNi 2 S 4 heterostructure (TL-NiCo LDH@CoNi 2 S 4 ) was synthesized by nickel ions etching and subsequent partial in situ sulfuration process. The tremella-like nanostructure consisted of ZIF-derived tremella-like NiCo LDH nanostructure (TL-NiCo LDH) and CoNi 2 S 4 nanoparticles. This architecture could enlarge the contact area, expose abundant electroactive sites, and provide ample channels for electron/ion transport. In addition, the nanosheets were closely interconnected and mutually supported, enhancing the structural stability. Moreover, the in situ formation of TL-NiCo LDH@CoNi 2 S 4 heterostructure can induce the electron redistribution at the heterostructure interface, boosting the electrical conductivity and reducing the adsorption energy of OH − . The optimized TL-NiCo LDH@CoNi 2 S 4 heterostructure exhibited a high capacity of 1136.0C g −1 at 1 A g −1 , excellent rate capability of 57.7% initial capacity retention at 10 A g −1 . Additionally, the electrode demonstrated superior cycling durability, retaining 87.8% of its initial capacity at 10 A g −1 over 10,000 charge-discharge cycles. Furthermore, the as-fabricated TL-NiCo LDH@CoNi 2 S 4 //activated carbon device delivered a notable energy density of 51.4 W h kg −1 when operated at 800 W kg −1 .
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wei Jiang,Xin Cui,Xiaoyang Yang,Zeyi Liu,Zhenqiang Yuan,Haoyu Qiu,Jiafeng Wan,Fangwei Ma
Bimetallic sulfide is an outstanding pseudocapacitive material with high theoretical specific capacitance and good electronic conductivity. Herein, nickel–cobalt bimetallic sulfide (CoNi2S4/NiS) nanoframes composed of thin sheets are synthesized from Ni–Co Prussian blue analogues (NiCo-PBA) by an ion exchange method. The influence of sodium sulfide solution concentration on the morphology and supercapacitor (SC) performances of sulfides is systematically investigated. Benefiting from the unique nanoframe structure composed of nanosheet morphology and bimetallic active sites, the CoNi2S4/NiS-30 electrode displays a high specific capacity of 1243 C g–1 at 1 A g–1 and a high capacity retention rate of 75% when increasing the current density by 20-fold. It is worth emphasizing that the rate performance was improved by 68% compared with that of Ni3S4/NiS before ion exchange. The assembled asymmetric supercapacitor (ASC) exhibits an energy density of 48.6 Wh kg–1 at a power density of 963 W kg–1 and good cycling stability, with a capacity retention rate of 81% after 5000 cycles. Moreover, the all-solid-state supercapacitor (SASC) has an energy density of 46.7 Wh kg–1 at a power density of 1081 W kg–1, and two SASCs connected in series can power an LED for exceeding 4 min. This study offers an innovative strategy to develop high-performance bimetallic sulfides for asymmetric supercapacitors.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Cui,Xiaoyang Yang,Zeyi Liu,Wei Jiang,Jiafeng Wan,Yifu Liu,Fangwei Ma
Construction of Prussian blue analogues (PBAs) with heterostructure is beneficial to preparing PBAs derivatives with superior electrochemical performance. In this work, the core–shell nanostructured nanocubes composed of nickel hexacyanocobalt PBA (NiCo-PBA)@cobalt carbonate hydroxide (CCH) are synthesized through an in-situ epitaxial growth strategy, and the formation mechanisms of coating are carefully validated and specifically discussed. Then, the precursors are successfully transformed into hierarchical CoNi 2 S 4 /Co 9 S 8 @Co 4 S 3 via the gas-phase vulcanization method. Benefiting from the intriguing heterostructure and multicomponent sulfides, the CoNi 2 S 4 /Co 9 S 8 @Co 4 S 3 -80 electrode exhibits a high specific capacity of 799 ± 16C/g (specific capacitance of 1595 ± 31F/g) at 1 A/g, ultra-high capacity retention of 80 % at a high current density of 20 A/g. The assembled asymmetric supercapacitor (ASC) device delivers a high energy density of 43.3 Wh kg −1 at a power density of 899 W kg −1 and exhibits superior cycling stability with the capacity retention of 88 % after 5,000 cycles. Subsequently, the fabricated all-solid-state ASC device shows an excellent energy density of 36.4 Wh kg −1 with a power density of 824 W kg −1 . This work proposing rational design of combining multicomponent sulfides and core–shell heterostructure based on PBA nanocubes opens up a novel route for developing asymmetric supercapacitor electrode materials with superior performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jiaoe Dang,Sining Yun,Yongwei Zhang,Guangping Yang,Jingjing Yang,Dan Qiao,Tianxiang Yang
Fabrication of efficient non-precious electrocatalysts with hierarchical nanostructures and the desired compositions is highly desirable to enhance the catalytic activity and stability for hydrogen evolution reaction (HER) and triiodide reduction reaction (IRR). This work proposes a zeolitic imidazolate framework (ZIF) template-based strategy to generate sulfide embedded in nitrogen-doped carbon with a hierarchical 2D/3D nanocage structure. ZIF-67, as a sacrificial template, is first etched to form 2D/3D NiCo layered double hydroxide/2-Methylimidazole (NiCo LDH/MeIm) and then converted to CoNi 2 S 4 nanoparticles embedded in nitrogen-doped carbon (CoNi 2 S 4 /NC) through one-step sulfurization and pyrolysis . When a core–shell ZIF-8@ZIF-67 is designed as a template for the generation of Ni@NiCo LDH/MeIm, the obtained NiS@CoNi 2 S 4 /NC not only retains the unique 2D/3D nanostructure but also has a high N content, abundant active sites, larger specific surface area, and hierarchical pore distribution. NiS@CoNi 2 S 4 /NC mediates an overpotential of 126 mV at 10 mA cm −2 and a Tafel slope of 47.2 mV dec -1 in the alkaline HER. The solar cell equipped with NiS@CoNi 2 S 4 /NC as the IRR catalyst achieves a high cell efficiency of 7.96 %. NiS@CoNi 2 S 4 /NC shows durably high HER and IRR activity. This controllable synthetic strategy provides a valuable support for developing efficient catalysts in electrocatalytic energy conversion systems.
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
危险品化学品经营许可证（带存储）