Nanomaterials
·
2022
·Vol. 12
·期 8
·1347
·
IF 5.719
Wen Jiang,Lingling Dong,Shuanghui Liu,Shuangshuang Zhao,Kairu Han,Weimin Zhang,Kefeng Pan,Lipeng Zhang
Lithium-sulfur batteries exhibit great potential as one of the most promising energy storage devices due to their high theoretical energy density and specific capacity. However, the shuttle effect of the soluble polysulfide intermediates could lead to a severe self-discharge effect that hinders the development of lithium-sulfur batteries. In this paper, a battery separator has been prepared based on NiFe2O4/Ketjen Black (KB) modification by a simple method to solve the shuttle effect and improve the battery performance. The as-modified separator with the combination of small-size KB and NiFe2O4nanoparticles can effectively use the physical and chemical double-layer adsorption to prevent polysulfide from the shuttle. Moreover, it can give full play to its catalytic effect to improve the conversion efficiency of polysulfide and activate the dead sulfur. The results show that the NiFe2O4/KB-modified separator battery still maintains a discharge capacity of 406.27 mAh/g after 1000 stable cycles at a high current density of 1 C. Furthermore, the coulombic efficiency remains at 99%, and the average capacity attenuation per cycle is only 0.051%. This simple and effective method can significantly improve the application capacity of lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Tianbao Li,Cai Qi,Xiaoxiang Lu,Feiyue Tu,Zhongliang Li,Can Jiao,Mingdao Zhang
The practical application of lithium-sulfur (Li-S) battery is impeded by some technical hurdles such as short cycle life and poor capability, which is radically caused by the uncontrollable electrochemical reactions at the cathode. In this work, we develop a Ketjen Black carbon-based cathode material, modified with transition metals through the coordination fixing action of 2, 2′-bipyridine and followed with an annealing activation process, to be employed as the sulfur host in a Li-S battery. It is demonstrated that the decoration of Co and Fe on the matrix of carbon can substantially enhance the efficiency for catalytic conversion of polysulfides in Li-S batteries, thus greatly improving the performance, including capacity, rate capability and cycling life. This simple and economic strategy of modifying the commercial Ketjen Black shall accelerate the practical application of Li-S battery.
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 Chemistry
·
2020
·
IF 7.216
Nan Jiang,Guangyu Jiang,Dechao Niu,Jiayi Mao,Meiwan Chen,Kaiyuan Li,Yongsheng Li
The low sulfur utilization and fast capacity fading resulting from the sluggish redox reaction and abominable polysulfides shuttle greatly hinder the practical applications of lithium-sulfur (Li-S) batteries. Herein, we develop a facile “ in-situ growth” method to decorate ultra-small Mo 2 C nanoparticles (US-Mo 2 C) on the surface of Ketjen Black (KB) to functionalize the commercial polypropylene (PP) separators, which can accelerate the redox kinetics of lithium polysulfides conversion and effectively increase the utilization of sulfur for Li-S batteries. Importantly, the US-Mo 2 C nanoparticles have abundant sites for chemical adsorption towards polysulfides and the conductive carbon networks of KB have cross-linked pore channels, which can promote electron transport and provide physical barrier and volume expansion space for polysulfides. Due to the combined effects of the US-Mo 2 C and KB, Li-S cells employing the multifunctional PP separators modified with KB/US-Mo 2 C composite (KB/US-Mo 2 C@PP) exhibit a high specific capacity (1212.8 mAh g −1 at 0.2 C), and maintain a reversible capacity of 1053.3 mAh g −1 after 100 cycles. More importantly, the KB/US-Mo 2 C@PP cells with higher sulfur mass loading of 4.9 mg cm −2 have superb areal capacity of 2.3 mAh cm −2 . This work offers a novel and promising perspective for high-performance Li-S batteries from both the shuttle effect and the complex polysulfides conversion.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 17
·3509
·
IF 4.967
Jingyu Li,Yexin Dai,Shipu Jiao,Xianhua Liu
Metal-organic frameworks (MOFs) have the advantages of tunable pore sizes and porosity and have demonstrated unique advantages for various applications. This study synthesized composite MOF nanomaterials by modifying MOF801 or AlOOH with UIO66. The composite nanomaterials, UIO66/MOF801 and UIO66/AlOOH showed increased Zeta potential than their pristine form, AlOOH, UIO66 and MOF801. For the first time, the composite MOFs were used to fabricate filter paper-based evaporation-driven power generators for spontaneous electricity generation. The MOFs-KBF membrane was constructed by coating filter paper (10 × 50 mm) with composite MOFs and conductive Ketjen Black. The UIO66/MOF801 decorated device achieved a maximum open circuit voltage of 0.329 ± 0.005 V and maximum output power of 2.253 μW. The influence of salt concentration (0.1–0.5 M) on power generation was also analyzed and discussed. Finally, as a proof-of-concept application, the device was employed as a salinity sensor to realize remote monitoring of salinity. This work demonstrated the potential of flexible MOF composites for spontaneous power generation from water evaporation and provides a potential way to enhance the performance of evaporation-driven power generators.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yurui Wu,Ming Yang,Shuimiao Wang,Siyao Hou,Yaqun Zou,Yong Tao,ChangAn Yang
Lithium-sulfur (Li-S) battery is considered as one of the most promising energy storage devices due to its exceptional energy density . However, its development is largely hampered by the shuttle effect of lithium polysulfide and the sluggish electrochemical kinetics of sulfur cathode. In this study, a novel sulfur-rich polymer is synthesized through the inverse vulcanization of sulfur with 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (TVTCSi) and used as cathode material for Li-S batteries, which can effectively immobilize the lithium polysulfides through covalent bonds to impede its shuttling, leading to marked improvement in the cycling performance of the batteries. Furtherly, with the addition of Ketjen Black, the resulting composite cathode exhibited faster electrochemical reaction kinetics and higher cycling stability, which could deliver a reversible discharge capacity of 652 mAh g −1 after 500 cycles at a high current density of 0.5 C,0.5C with quite a low capacity decay rate of only 0.037% per cycle, which indicates broad perspectives of sulfur-rich polymer/Ketjen Black composite as cathode material in lithium-sulfur battery.
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
Nature Communications
·
2021
·Vol. 12
·期 1
·1-11
·
IF 14.919
Sun Hao,Chen Ling,Xiong Likun,Feng Kun,Chen Yufeng,Zhang Xiang,Yuan Xuzhou,Yang Baiyu,Deng Zhao,Liu Yu,Rümmeli Mark H.,Zhong Jun,Jiao Yan,Peng Yang
Electrochemical CO 2 reduction (CO 2 RR) in a product-orientated and energy-efficient manner relies on rational catalyst design guided by mechanistic understandings. In this study, the effect of conducting support on the CO 2 RR behaviors of semi-conductive metal-organic framework (MOF) — Cu 3 (HITP) 2 are carefully investigated. Compared to the stand-alone MOF, adding Ketjen Black greatly promotes C 2 H 4 production with a stabilized Faradaic efficiency between 60-70% in a wide potential range and prolonged period. Multicrystalline Cu nano-crystallites in the reconstructed MOF are induced and stabilized by the conducting support via current shock and charge delocalization, which is analogous to the mechanism of dendrite prevention through conductive scaffolds in metal ion batteries. Density functional theory calculations elucidate that the contained multi-facets and rich grain boundaries promote C–C coupling while suppressing HER. This study underlines the key role of substrate-catalyst interaction, and the regulation of Cu crystalline states via conditioning the charge transport, in steering the CO 2 RR pathway.
研究领域:
电化学
·
材料科学
·
催化
·
能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Xinhao Zhang,Jinjuan Zhao,Sizhuo Ma,Ruifa Jin,Shuwen Li
The integration of diverse carbon materials using a suitable “linker” to form a supporting matrix is recognized as an effective strategy for fabricating efficient and durable electrocatalysts for the methanol oxidation reaction (MOR). Herein, we design and fabricate an advanced electrocatalyst consisting of the coupling Ketjen black (KB) with carbon nanotubes (CNTs) by polydopamine-linking anchoring “surface-clean” Pd nanocrystallines (Pd/KB-PDA-CNTs). As an alkaline-MOR electrocatalyst, the fabricated-Pd/KB-PDA-CNTs demonstrates dramatically enhanced electrocatalytic performance, notably superior activity and durability compared to commercial Pd/C. The electrochemical experimental assessments combined with systematic characterizations show that the polydopamine-linking is pivotal significantly to enhance alkaline-MOR electrocatalytic behavior. Briefly, coupling KB with CNTs via polydopamine-linking not only offers plentiful mass/electron/proton-transfer channels, but also introduces affluent functional groups (hydroxyl groups, imine/amine, catechol and benzene rings), which endows abundant reactive sites for nucleating, growing and anchoring Pd nanocrystallines thereby enabling an efficient regulation of the size, morphology, distribution and electronic state for Pd. The implementation of the coupling KB with CNTs by polydopamine-linking indicates that the coupling different types of carbon materials by polydopamine-linking is a promising strategy for rational designing advanced functional materials for application in electrocatalysis and beyond.
研究领域:
电催化
·
材料化学
·
纳米材料
·
能源化学
·
表面科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 21
·1-13
·
IF 2.8
Sun Li,Wang Shuimiao,Bai Yuehao,Li Guang,Tao Yong,Wang Wei,Yang ChangAn
Lithium–sulfur (Li–S) batteries have garnered significant research interest owing to their exceptional theoretical energy density, coupled with the cost-effectiveness and environmental sustainability inherent in sulfur-based cathode materials. Nevertheless, the practical implementation of these systems remains impeded by challenges, such as the shuttle effect of soluble lithium polysulfide intermediates during cycling, which contributes to rapid capacity degradation and suboptimal electrochemical performance in current Li–S configurations. Herein, a sulfur-containing composite, S@V 2 O 5 /KB, was synthesized using a straightforward high-temperature melt synthesis method. The V 2 O 5 /KB composite was obtained by mixing vanadium pentoxide (V 2 O 5 ) and Ketjen black (KB) through a simple ultrasonic process, followed by high-temperature melting to yield the sulfur-containing composite, S@V 2 O 5 /KB. Constant current discharge tests demonstrated that the addition of KB as a conductive agent significantly improved the performance of the battery. The optimal performance was achieved when the mass ratio of V 2 O 5 to KB was 2:1. After 100 cycles at a rate of 0.5C, the capacity of 678.3 mA h g −1 was retained, resulting in a capacity retention rate of 71.67%.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Lin Shan,Cai Yurong,Yang Jing,Ruan Feixia,Wu Jun,Sireesh Babu,Yao Xin,Gao Junkuo,Yao Juming
The application of lithium-sulfur batteries is limited due to low electric conductivity of sulfur and “shuttle effect” caused by diffusion of soluble polysulfides to the anode. In this study, self-made mesoporous TiO 2 and commercial Ketjen Black are mixed to obtain a composite material, which is then coated on glass fiber membrane through a slurry method. The modified glass fiber membrane is used as a functional separator in lithium-sulfur battery. The batteries using modified separator show a high initial discharge specific capacity of 1130.3mAh g −1 at 0.2C and an excellent cycling stability of 991.8mAh g −1 even after 60 cycles, and initial discharge specific capacity of 996.7mAh g −1 at 0.5C and 804.3mAh g −1 even after 100 cycles. The improved performance of the battery can be ascribed to effective adsorption of mesoporous TiO 2 to the soluble polysulfides and limit diffusion of the reaction intermediate to anode side . Moreover, the excellent electrical conductivity of Ketjen Black coated on the surface of glass fiber membrane can reduce the internal resistance, activate the absorbed polysulfides, and increase the specific capacity of the lithium-sulfur battery. It is believed that mesoporous TiO 2 and Ketjen Black modified glass fiber membrane effectively suppresses the “shuttle effect” during the cycling and provides a promising approach for high-performance lithium-sulfur batteries.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
表面科学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Rauf Muhammad,Wang Jingwen,Iqbal Waheed,Abbas Mazhar,Khan Sayed Ali,Khan Qudrat Ullah,Ren Xiangzhong,Zhang Peixin,Li Yongliang
The exploration of noble metal-free catalysts with efficient electrochemical performance toward oxygen reduction reaction in the acid electrolyte is very important for the development of fuel cells technology. Novel pyrolyzed heteroatom-doped Fe/N/C catalysts have been regarded as the most efficient electrocatalytic materials for ORR due to their tunable electronic structure, and distinctive chemical and physical properties. Herein, nitrogen- and sulfur-doped (Fe/N/C and Fe/N/C-S) electrocatalysts were synthesized using ferric chloride hexahydrate as the Fe precursor, N-rich polymer as N precursor, and Ketjen Black EC-600 (KJ600) as the carbon supports. Among these electrocatalysts, the as prepared S and N-doped Fe/N/C-S reveals the paramount ORR activity with a positive half-wave potential value (E1/2) 0.82 at 0.80 V vs. RHE in 0.1 mol/L H2SO4 solution, which is comparable to the commercial Pt/C (Pt 20 wt%) electrocatalyst. The mass activity of the Fe/N/C-S catalyst can reach 45% (12.7 A g−1 at 0.8 V) and 70% (5.3 A g−1 at 0.95 V) of the Pt/C electrocatalyst in acidic and alkaline solutions. As result, ORR activity of PGM-free electrocatalysts measured by the rotating-ring disk electrode method increases in the following order: Fe/N/C
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2023
·
IF 2.9
Xuhuai Fu,Yunyao Lu,Yang Peng
Ultrasensitive detection of circulating tumor cells (CTCs) holds significant clinical importance in monitoring metastasis and therapeutic outcomes. In this study, we have developed a novel electrochemical sensing model based on nanomaterials for highly sensitive and specific determination of CTCs. A gold electrode co-modified with Ketjin black (KB) and Au nanoparticles (AuNPs) exhibits exceptional conductivity. By conjugating palladium-iridium cubic nanozyme (Pd–Ir CNE) with antibodies, we have created a detection probe capable of catalyzing hydrogen peroxide (H 2 O 2 ), thereby amplifying the output signal and resulting in significantly enhanced current on the electrode for detecting CTCs. The constructed immunosensor has achieved a detection limit of 2 cell mL −1 for model MCF-7 cells. Furthermore, the as-constructed electrochemical immunosensor can accurately detect whole blood-spiked target CTCs, showing great promise for clinical applications in early cancer diagnosis and prognosis.
研究领域:
医学诊断
·
生物材料学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Meimei Guo,Fang Li,Qiwen Ran,Gan Zhu,Yunhang Liu,Jiale Han,Guifang Wang,Hongyuan Zhao
A novel methyl parathion (MP) electrochemical sensor was fabricated from the multifunctional composite of Zr-based metal–organic framework (UiO-66) and Ketjen black-carbon nanotubes (KB-CNTs), which achieved the sensitive detection of MP in food samples. For the UiO-66/KB-CNTs composite, Zr-based UiO-66 with Zr-OH groups possessed good affinity for phosphate groups on methyl parathion molecules, which enhanced the selective recognition and enrichment capability towards MP, and KB-CNTs possessed three-dimensional interconnected carbon conductive network with synergistic point-line carbon conductive contact, which showed excellent electrical conductivity. Moreover, KB with pearl chain-like structure and more conductive contact points realized the full contact between KB-CNTs and UiO-66 with Zr-OH groups. The fabricated UiO-66/KB-CNTs/GCE sensor showed good MP detection performance with low limit of detection of 1.53 nM in linear MP concentration range of 0.005–12 µM. Moreover, the fabricated sensor showed good repeatability, reproducibility, and selectivity. A good practical feasibility can be achieved at the UiO-66/KB-CNTs/GCE sensor for the detection of MP in grape juice and apple juice samples (Recovery rate: 96.14–102.93, relative standard deviation: 2.17%-4.95%).
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 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）