Materials Today Communications
·
2024
·
IF 3.7
Zhenqiang Huang,Yanan Zhang,Ke Jia,Rui Zuo,Kemeng Ji,Mingming Chen
Lithium-sulfur batteries (LSBs) emerge as promising energy storage devices due to their high theoretical energy density . So far, there are constrained issues that need to be urgently addressed, such as the shuttle effect of lithium polysulfides (LiPS) and the sluggish kinetics of redox reactions . Herein, NiSe-Ni 2 P/C composite was synthesized and casted on the cathode side of polypropylene (PP) separator. This investigation reveals that the adsorption-catalysis synergistic effect of NiSe-Ni 2 P/C composite, accelerates the reduction of LiPS to lithium sulfide (Li 2 S) as well as the oxidation of Li 2 S. The synergistic effect effectively mitigates the shuttle effect of LiPS, reduces concentration polarization, and improves Coulombic efficiency (CE) throughout the entire lifespan. At a current density of 0.05 C, LSBs with NiSe-Ni 2 P/C modified PP separators exhibit a remarkable high initial CE of 97.0% and a substantial discharge specific capacity of 1205.4 mAh g s −1 . Even under conditions of a high sulfur loading (4.3 mg cm −2 ) and a limited electrolyte dosage (10 μL mg s −1 ), the LSBs maintained a reversible specific capacity of 804 mAh g s −1 , a CE of 94%, and an energy density of 1232.1 Wh kg s −1 after 720 h of continuous cycling at 0.05 C. This work provides a solution for achieving long-time, high-capacity, and high-CE electrochemical performance in LSBs with a high sulfur loading and a limited electrolyte dosage.
研究领域:
能源存储
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Chun Tang,Zhi Liang Zhao,Jie Chen,Bo Li,Liang Chen,Chang Ming Li
The direct urea fuel cell holds great promise for energy-sustainable developments and mitigating water contamination but it still faces a great challenge to overcome the sluggish kinetics of the urea oxidation reaction (UOR). In this work, we report Se-Ni(OH) 2 -shelled vertically oriented NiSe nanowires on a Ni foam as an electrocatalyst toward UOR, showing a low potential of 0.366 V vs. SCE to drive 100 mA cm −2 in alkaline solution and out-performing all the reported non-noble-metal UOR catalysts up to date. Experimental results and theoretical calculation reveal that the vertically and distantly arranged nanowires with highly porous structure produce high mass transport paths for urea to fully access the reaction sites, the NiSe core offers high conductivity for fast electron transport , and the Se-Ni(OH) 2 shell provides large amount of active catalytic sites while lowering the CO 2 adsorption/desorption barrier than Ni(OH) 2 for fast reaction kinetics. This work opens up an exciting new direction to design electrocatalysts for high performance fuel cells and other energy applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 15
·期 1
·259-265
·
IF 8.307
Lin Tian,Zhenyang Chen,Tingjian Wang,Ming Cao,Xinhua Lu,Wenjing Cheng,Changchun He,Ju Wang,Zhao Li
Oxygen evolution reactions (OERs) are regarded as the rate-determining step of electrocatalytic overall water splitting, which endow OER electrocatalysts with the advantages of high activity, low cost, good conductivity, and excellent stability. Herein, a facile H2O2-assisted etching method is proposed for the fabrication of Mo-doped ultrathin Co9Se8@NiSe/NF-X heterojunctions with rich Se vacancies to boost electrocatalytic water oxidation. After step-by-step electronic structure modulation by Mo doping and Se vacancy engineering, the self-standing Mo-Co9Se8@NiSe/NF-60 heterojunctions deliver a current density of 50 mA cm−2 with an overpotential of 343 mV and a cell voltage of only 1.87 V at 50 mA cm−2 for overall water splitting in 1.0 M KOH. Our study opens up the possibility of realizing step-by-step electronic structure modulation of nonprecious OER electrocatalysts via heteroatom doping and vacancy engineering.
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
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Tingxia Wang,Xin Li,Yimin Jiang,Yaxin Zhou,Lingpu Jia,Chunming Wang
An efficient electrocatalyst based earth-abundant materials for hydrogen evolution reaction (HER) is a prerequisite for improving the efficiency of producing hydrogen. However, the synthesis of such electrocatalysts by a simple and environmentally friendly method is still a tremendous challenge. Herein, NiSe nanoparticles were in situ deposited on the reduced graphene oxide-polyimide/carbon nanotube (RGO-PI/CNT) film by a green electrodeposition method. The NiSe nanoparticles on the RGO-PI/CNT (NiSe-RGO-PI/CNT) film was employed directly as a highly active HER electrocatalyst. The RGO-PI/CNT film allowed NiSe nanoparticles to grow rapidly on its surface. NiSe nanoparticles with a small size of 35–45 nm were distributed uniformly on the surface of the RGO-PI/CNT film. The good dispersity of NiSe nanoparticles permitted the exposure of more active sites, which enhanced the activity of HER on the NiSe-RGO-PI/CNT film. The NiSe-RGO-PI/CNT film performed well HER behaviors featured by a low overpotential (270 mV), a small Tafel slope (61 mV dec −1 ) and a considerable stability. The efficient HER performance of the NiSe-RGO-PI/CNT film was originated from the synergistic effect between the RGO-PI/CNT film and NiSe nanoparticles. This exploration provided a straightforward and green method to prepare a film electrocatalyst for HER.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Lifang Gao,Zhenbang Liu,Jinling Ma,Lijie Zhong,Zhongqian Song,Jianan Xu,Shiyu Gan,Dongxue Han,Li Niu
A key challenge for the conversion of 5-hydroxymethylfurfural (HMF) into value-added 2,5-furandicarboxylic acid (FDCA) is improving the sluggish kinetics of selective oxidation alcohol groups. Electrocatalysis has been proved to be a green and efficient strategy for heterogeneous synthetic chemistry. Herein, we report an electrocatalyst of NiSe@NiO x core-shell nanowires for efficiently upgrading HMF into FDCA. The NiSe@NiO x features conductive NiSe nanowires as a core and active NiO x as a shell, showing a smaller Tafel slope of 23 mV dec −1 accompanying with a near-quantitative yield of FDCA and 99% Faradaic efficiency (FE). X-ray photoelectron spectroscopy unveils the high valence of Ni species in the NiO x shell may be the active sites. Further integrated electrolyzer can produce FDCA and hydrogen simultaneously, showing a 100% FE even after six successive cycles, disclosing robust stability. All these results demonstrate NiSe@NiO x core-shell nanowires as a promising robust non-precious electrocatalyst for highly efficient biomass transformation.
研究领域:
化学工程
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材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jingchun Jia,Linghui Zhao,Ying Chang,Meilin Jia,Zhenhai Wen
With the development of direct methanol fuel cell (DMFC), methanol oxidation reaction (MOR) becomes the crux of the application of DMFC, and the preparation of cheap, efficient MOR electrocatalyst is still the focus of researchers. Hence, we have prepared NiSe/RGO nanoparticles by a simple and universal way using pyrolyzation and selenylation. The MOR of NiSe/RGO is tested in 0.5 M MeOH/1 M KOH solution. Compared with the precursor Ni, NiSe/RGO-550 has outstanding performance for MOR with onset potential is 1.35 V vs. RHE, and 59.84 mA cm −2 for peak current density, and it can stable catalytic oxidation of methanol more than 4000 s. Because of the augment of active sites after selenization and the load of RGO enhanced electroconductibility, NiSe/RGO-550 has remarkable performance for MOR. This work provides the possibility of high performance, low cost catalysts for energy storage, conversion and practical applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Hui Peng,Jiezi Zhou,Kanjun Sun,Guofu Ma,Zhiguo Zhang,Enke Feng,Ziqiang Lei
Herein, a novel asymmetric supercapacitor (ASC) with high energy density is fabricated based on the NiSe@MoSe2 nanosheet arrays and the nitrogen-doped pomelo mesocarps-based carbon nanosheet (N-PMCN) as a positive electrode and a negative electrode, respectively. The novel NiSe@MoSe2 nanosheet arrays are designed and prepared by a facile one-step hydrothermal growth method from nickel foam as a nickel precursor and nucleation framework. The N-PMCN is prepared using simultaneous CaCl2 activation and urea nitrogen-doped processes from thepomelo mesocarps as a biomass-based carbon precursor. Because of the unique nanosheet array architecture of NiSe@MoSe2 and interconnected sheet-like porous morphology with high nitrogen content (∼9 wt %) of N-PMCN, they exhibit a maximum specific capacity of 128.2 mAh g–1 and high specific capacitance of 223 F g–1 at a current density of 1 A g–1. Moreover, the assembled novel NiSe@MoSe2//N-PMCN ASC device with a maximum operating voltage of 1.65 V has demonstrated a high energy density of 32.6 Wh kg–1 at a power density of 415 W kg–1 and outstanding cycling stability with 91.4% capacitance retention after 5000 cycles in aqueous electrolyte.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yuan-Zi Xu,Cheng-Zong Yuan,Xue-Ping Chen
In this article, we describe a NiSe@CoOOH core-shell nanostructure nanowires supported on nickel foam(NiSe@CoOOH NWs/NF) have been successfully synthesized by a facile approach for the first time. The NiSe@CoOOH NWs/NF has been confirmed by XRD, SEM images, TEM images, XPS, EDX and HRTEM. The NiSe@CoOOH NWs/NF, as a 3D oxygen-evolving and nonprecious-metal catalyst, shows high catalytic performance for oxygen evolution reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dingdiao Mo,Guoxiang Chen,Jiaxing Zhang,Zhiwei Xiang,Chao Huang,Weitong Cai,Jie Cui,Wei Su
Designing low-cost, efficient, and durable bifunctional electrocatalysts can significantly reduce the cost of industrial electrolysis of water. In this article, a novel self-supported nickel–iron foam completely covered with Ni 2 B particles was prepared through a solid-phase boronization method as the substrate (referred to as NFF-B). Then, an independent columnar Co-doped NiSe electrocatalyst composed of petal-shaped nanosheets was synthesized on NFF-B via a stirring-electrodeposition method. For comparison, a series of reference samples were also synthesized using the same process. The synthesized Ni 0.5 Co 0.5 Se/NFF-B exhibited excellent bifunctional catalytic activity and stability, with an HER overpotential of 90 mV and an OER overpotential of only 182 mV in 1 M KOH at 10 mA‧cm −2 . More importantly, the assembled Ni 0.5 Co 0.5 Se/NFF-B||Ni 0.5 Co 0.5 Se/NFF-B overall water splitting system required only 1.49 V to drive the electrolysis of water at 10 mA‧cm −2 , maintaining exceptional stability for 115 h under these conditions, surpassing most previously reported bifunctional electrocatalysts. Our work offers a new strategy for preparing efficient and durable bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qiao Cu,Chaoqun Shang,Guofu Zhou,Xin Wang
The fabrication of freestanding electrodes for Na + storage is necessary to achieve high energy density. However, the large radius of Na + results in a large volume fluctuation and sluggish reaction kinetics of active materials, particularly at a high active material content, thereby impeding electrochemical performance with undesirable cycling performance or rate capability. In this study, a freestanding electrode based on the “NiSe grafted on Cu 2-x Se” heterostructure with double-carbon protective shells (NiSe/Cu 2-x Se@C@NCNFs) was successfully constructed for Na + storage. In this microstructure, N -doped carbon nanofibers (NCNFs) serve as the stem of the twinborn NiSe/Cu 2-x Se heterostructure with a built-in electric field, where NiSe improves Na + absorption and Cu 2-x Se enhances Na + diffusion. The “graft” design enabled the freestanding NiSe/Cu 2-x Se@C@NCNFs electrode with a high active mass content of 76.1 wt% to exhibit superior electrochemical performance for Na + storage (75 mAh g −1 at 2 A g −1 ) compared to those of Cu 2-x Se@C@NCNFs (26 mAh g −1 at 2 A g −1 ) and NiSe@C@NCNFs (9 mAh g −1 at 2 A g −1 ).
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Ziwei Ma,Jingyi Wang,Wei Wang,Xueyi Song,Yating Liu,Shaobin Wang,Yunjin Yao
We engineered a NiSe/Ni₃Se₂ heterostructure on nickel foam that activates formic acid for rapid hexavalent chromium detoxification. We used one-step hydrothermal growth and probed structure and mechanism by diffraction and spectroscopy, electron microscopy, electron paramagnetic resonance with 5,5-dimethyl-1-pyrroline N-oxide, and batch and fixed-bed tests. The optimized catalyst removed 99.7% of 50 mg L⁻¹ hexavalent chromium in 40 minutes at 25 °C, achieved full removal of 1 mg L⁻¹ in 20 minutes, tolerated common ions, and maintained 100% removal for 180 h in continuous flow. Mechanistic analyses show a radical pathway dominated by hydrogen radicals (H ⁎ ) and carbon dioxide radical anions ( C O 2 • − ), promoted by selenium vacancies and tightly coupled nickel selenide interfaces that accelerate formic-acid activation and interfacial charge transfer. Operating without external energy input, this monolithic architecture avoids powder recovery and minimizes pressure drop and cost, offering a general route to defect-engineered selenides for efficient, low-cost environmental redox remediation.
研究领域:
环境化学
·
催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Jie Zhao,Saifang Huang,Yuyan Zhao,Bing Wu,Haiqin Lin,Zixuan Chen,Yudong Zhang,Weiji Dai,Can Cui
Solid-state lithium metal batteries (SSLMBs) face critical challenges, including low ionic conductivity, unstable electrode–electrolyte interfaces, and lithium dendrite growth issues. To address these issues, we designed a PVDF-based composite electrolyte embedded with NiSe nanosheets (PVDF-NS). The two-dimensional NiSe facilitated the in situ formation of Li2Se at the interface, promoting dendrite suppression by enhancing Li+ transport (room-temperature ionic conductivity: 5.53 × 10–4 S·cm–1; transference number: 0.449) and constructing a stable SEI layer. Notably, PVDF-NS supported Li||Li symmetric cells demonstrated excellent stability for over 2000 h at 0.2 mA·cm–2. When paired with NCM811 cathodes, full cells demonstrated 86.3% capacity retention over 300 cycles at 2 C. Additionally, the electrolyte exhibited high oxidative stability (4.83 V vs Li+/Li) and retained a capacity of 65.6 mAh·g–1 at 5 C, underscoring its practical applicability. This interfacial engineering approach presents a scalable and effective route for developing durable, high-performance solid electrolytes for next-generation SSLMBs.
研究领域:
材料科学
·
电化学
·
储能
·
纳米技术
·
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）