ACS Applied Materials & Interfaces
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2024
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IF 8.3
Xiaofang Liu,Manman Yuan,Wenhua Shi,Anmin Fei,Yawen Tian,Zhi-Yi Hu,Lihua Chen,Yu Li,Bao-Lian Su
Silicon (Si) is considered as the most likely choice for the high-capacity lithium-ion batteries owing to its ultrahigh theoretical capacity (4200 mA h g–1) being over 10 times than that of traditional graphite anode materials (372 mA h g–1). However, its widespread application is limited by problems such as a large volume expansion and low electrical conductivity. Herein, we design a hollow nitrogen-doped carbon-coated silicon (Si@Co-HNC) composite in a water-based system via a synergistic protecting-etching strategy of tannic acid. The prepared Si@Co-HNC composite can effectively mitigate the volume change of silicon and improve the electrical conductivity. Moreover, the abundant voids inside the carbon layer and the porous carbon layer accelerate the transport of electrons and lithium ions, resulting in excellent electrochemical performance. The reversible discharge capacity of 1205 mA h g–1 can be retained after 120 cycles at a current density of 0.5 A g–1. In particular, the discharge capacity can be maintained at 1066 mA h g–1 after 300 cycles at a high current density of 1 A g–1. This study provides a new strategy for the design of Si-based anode materials with excellent electrical conductivity and structural stability.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yu Zhang,Yaolong Zhang,Ruxangul Jamal,Shuyue Xie,Abdukeyum Abdurexit,Tursun Abdiryim,Hongtao Yang,Kai Song
To improve the efficiency of the methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), it is essential to develop catalysts with high catalytic activity. However, constructing polyatomic doped carbon nanomaterials and understanding the interaction mechanisms between dopant elements remain significant challenges. In this study, we propose nitrogen-doped carbon nanobox (CNB) derived from Zeolitic Imidazolate Framework-67 (ZIF-67) crystals as precursors to serve as carriers for highly efficient platinum nanoparticles (Pt NPs). We synthesized platinum/poly(3,4-propylenedioxythiophene)/carbon nanobox (Pt/PProDOT/CNB) composites by wrapping CNB around PProDOT films via in situ oxidative polymerization. This unique structural design provides several advantages to the catalyst, including a large active surface area, numerous accessible electrocatalytic active centers, an optimized electronic structure, and good electronic conductivity. The Pt/PProDOT/CNB composites demonstrated excellent methanol oxidation performance, with a remarkable mass activity (MA) of 1639.9 mA mg -1 Pt and a high electrochemical active surface area (ECSA) of 160.8 m 2 /g. Furthermore, the catalyst exhibited good CO resistance and outstanding durability.
研究领域:
材料科学
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催化化学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2020
·Vol. 8
·期 22
·11327-11336
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IF 11.301
Shiyuan Zhou,Jiapeng Liu,Fanxuan Xie,Yinghao Zhao,Tao Mei,Zhengbang Wang,Xianbao Wang
The practical application of lithium–sulfur batteries has been restricted by the low operating rates and the low areal sulfur loading, resulting from the insulating and dissolving nature of sulfur and lithium polysulfides. Herein, we propose a “boxes in fibers” strategy and build a hierarchical three-dimensional conductive network, which is based on necklace-like N-doped carbon nanofibers with threaded hollow carbon nanoboxes and TiC nanoparticles (CNB–TiC@CNF), via a facile electrospinning process. Ideally, a large amount of sulfur could be loaded in the hollow cavities of CNBs and the pores of CNFs, with physically/chemically active sites, while the interconnected conductive network is beneficial for fast Li+ diffusion and electron transfer. Depending on the hierarchical and porous framework, the volume variation of the lithium polysulfides can be further alleviated. The as-constructed CNB–TiC@CNF with enhanced adsorption and conversion ability to polysulfides achieves a high discharge capacity of 1611 mA h g−1 at 0.1C, high-rate performance up to 10C for 400 cycles with a decay rate of 0.15% and high sulfur areal loading performance with a stable areal capacity of 7.90 mA h cm−2 at 9.2 mg cm−2. Our work provides a novel and efficient strategy for the construction of a three-dimensional hierarchical host as a high-performance cathode for lithium–sulfur batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2017
·Vol. 5
·期 22
·11340-11347
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IF 8.867
Lei Cao,Zhen-huan Li,Yu Gu,Dao-hao Li,Kun-mei Su,Dong-jiang Yang,Bo-wen Cheng
Zn–air battery, as a low cost, high energy density, and safe energy device, has received significant attention in recent years. However, its wide application has been hindered due to the low oxygen reduction reaction (ORR) activity in air electrodes without excellent catalysts. Herein, N-doped porous and highly graphitic carbon nanobox-supported Fe-based nanoparticles (Fe–N-CNBs), which were synthesized from fructose, NH3, and FeCl3 by a self-propagating high-temperature synthesis (SHS) process followed by a heat treatment process, were used as ORR catalysts. Fe–N-CNBs calcined at 600 °C (Fe–N-CNBs-600) showed higher ORR activity (onset and half-wave potentials of 1.03 and 0.85 V vs. RHE, respectively), better electrochemical stability, and higher methanol tolerance than Pt/C under alkaline conditions. The outstanding ORR performance of Fe–N-CNBs-600 was attributed to the synergistic effect of Fe, Fe2N, and Fe3C nanoparticles, which was unambiguously confirmed by HRTEM and XRD characterization. Furthermore, Fe–N-CNBs-600 also exhibited higher electrochemical properties than the currently used expensive Pt/C catalyst in Zn–air batteries.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Bin Liu,Xinyu Wang,Rongyue Wang,Guanyi Zhang,Xiaoqin Xu,Jin Liu,Zhiyao Sun,Mingyang Liu,Cheng Wang,Xin Meng,Jiahao Xie,Jinlong Zou
Catalysts with high activity and corrosion-resistance are desirable for oxygen reduction and evolution reactions (ORR/OER) in rechargeable zinc-air batteries (ZABs). Herein, via an etching-phosphating-annealing strategy, CoP is in situ formed in hollow carbon-nanobox, both of which are wrapped by a thin nitrogen-doped carbon layer (CoP/HNBs@NCL). Tannic acid etches ZIF-67 nanobox to release Co 2+ and 2-methylimidazole to generate hollow structure. As-marked CoP/HNBs@NCL-2 (271.9 m 2 g −1 ) exhibits robust activities towards ORR (half-wave potential of 0.88 V) and OER (overpotential of 0.36 V), which outperforms many non-precious metal catalysts due to the strong interactions between CoP and N-species and the smooth mass transfer via the porous hollow structure. Even at high potentials (OER), HNBs@NCL framework can still relieve the leaching of Co species (leaching ratio of 15.5 % after 6 h) to obtain high corrosion resistance and stability. Theoretical calculations reveal that N atoms enhance the electron delocalization degree of Co sites in CoP to lower energy barriers and balance adsorption free-energies of O-intermediates to enhance oxygen electrocatalysis. Notably, ZAB with CoP/HNBs@NCL-2 air-electrode exhibits high peak power density (139.8 mW cm −2 ) and charge–discharge cycling stability (132 h). This work presents a reliable protocol to design hollow electrocatalysts with desirable bifunctional activity and stability for ZABs.
研究领域:
材料科学
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电化学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Mingyang Liu,Qi Li,Xudong Xiao,Xuena Ma,Xiaoqin Xu,Yihang Yin,Bin Zhang,Minghui Ding,Jinlong Zou,Baojiang Jiang
Interface engineering has been recognized as one of the most promising strategies for tuning the catalytic properties of catalysts. However, building well-defined nanointerfaces for efficient oxygen reduction/evolution reactions (ORR/OER) remains a challenge. Herein, a hollow heterostructure composed of highly-dispersed CoTe 2 inside the mesoporous walls of nitrogen-doped carbon nanoboxes and uniformly-dispersed NiTe 2 outside the mesoporous walls (H-CoTe 2 /NiTe 2 @NCBs) is designed via a ZIF67-involved etching-anchoring-tellurization strategy. Promising half-wave potential of 0.86 V and overpotential of 320 mV at 10 mA cm −2 are obtained by H-CoTe 2 /NiTe 2 @NCBs. The excellent ORR/OER activity of H-CoTe 2 /NiTe 2 @NCBs is ascribed to the synergistic coupling based on nanointerfaces between CoTe 2 and NiTe 2 . Density functional theory calculations confirm that the nanointerface-based electronic coupling between CoTe 2 and NiTe 2 facilitates the charge transfer between two components and generates abundant catalytically active sites at the heterointerface, thereby significantly promoting the ORR/OER activities. This work provides the design principles for transitional bimetallic tellurides as bifunctional electrocatalysts.
研究领域:
材料科学
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电化学
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催化
✓ 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）