ENERGY & FUELS
·
2022
·
IF 4.654
Jie Liu,Li Zhan,Kailing Sun,Kai Huang,Tongye Wei,Chengxin Wang
Rechargeable zinc-ion batteries (ZIBs) have attracted great interest as a result of the features of safety and low cost, but their commercial applications are still impeded by critical issues of the cathode materials, for instance, low effective specific capacity and short cycle life. Herein, a self-supported cathode with a high specific capacity (on the basis of the whole cathode) is fabricated via facile electrospinning. The prepared cathodes have about 10 nm vanadium oxide nanodots encapsuled in the carbon nanofiber with a diameter of 100–150 nm. The fiber film with the unique nanostructure can not only inhibit the vanadium element dissolution but can also be directly used as the cathode, avoiding extra additives. Consequently, the self-support cathode exhibits a satisfactory specific capacity of 319 mAh g–1 (0.1 A g–1), high rate performance of 215 mAh g–1 at a high-current density of 20 A g–1, and outstanding cycle ability (capacity retention of 63% after 18 000 cycles). Our results of the study provide a feasible and promising solution for preparation of a self-support cathode for aqueous ZIBs.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Min Liang,Wenya Li,Yuanqi Yang,Huizi Li,Jinji Liang,Chenhan Lin,Xiangcong Meng,Jun Liu,Zhicong Shi,Liying Liu
Smart wearable electronic devices are becoming more prevalent in our daily life, exceedingly arousing the increasing demand for flexible energy storage devices. Herein, a sodium superionic conductor (NASICON)-structured Na3V2(PO4)2F3 (NVPF) self-standing cathode is fabricated via an electrospinning technique. NVPF particles at the nanoscale are encapsulated in or attached to the surface of carbon nanofibers to form an NVPF self-standing cathode, which exhibits a high-voltage platform of ∼4.07 V with a reversible capacity of 101.8 mAh g–1 at 0.2C and 98.3% capacity retention after 400 cycles. Moreover, the soft package full battery, assembled with an NVPF self-standing cathode and a Na3V2(PO4)3 (NVP) anode, can light up a light-emitting diode in the folded/unfolded states. The superior sodium storage performance was enabled by the stable structure of the NVPF self-standing cathode. Moreover, the nitrogen-doped carbon nanofiber network of the NVPF self-standing cathode not only ensures the flexibility but also facilitates electron and Na+ transportation. This work provides an NVPF self-standing cathode with excellent mechanical and electrochemical performance for high-voltage flexible sodium-ion batteries, which is beneficial for promoting the practical application of high-voltage flexible sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Guang-He Dong,Yu-Qin Mao,Yuan-Qing Li,Pei Huang,Shao-Yun Fu
Designing cathodes with more electroactive materials is a promising way to improve the energy density of batteries while it is highly challenging due to their low electronic/ionic transport, poor structural integrity, and irreversible Li + consumption in full-cell configurations. Herein, we demonstrate a self-supporting cathode based on 3 dimensional MXene-Carbon nanotubes-Cellulose-LiFePO 4 (3D-MCC-LFP). The 3D-MCC-LFP cathodes demonstrate some distinct advantages over conventional LFP cathode (Con-LFP), including higher LFP loading (120 mg cm −2 ) and faster electronic/ionic transport (1.587 S cm −1 /1.18 × 10 −11 cm 2 S −1 ), which result in better electrochemical performance. Such as, the 3D-MCC-LFP 10 cathode (LFP loading is 10 mg cm −2 ) offers a significantly higher capacity of 0.86 mAh cm −2 at 5 C (1 C=170 mA g −1 ) than Con-LFP 10 of 0.05 mAh cm −2 , and a higher retaining capacity of 1.45 mAh cm −2 after 500 cycles at 1 C than Con-LFP 10 (1.16 mAh cm −2 ). Meanwhile, the 3D-MCC-LFP 120 cathode demonstrates an ultrahigh areal capacity of 19.2 mAh cm −2 . Furthermore, the assembled 3D-MCC-LFP 60 /SnO 2 full-cell demonstrates a high areal capacity of 6.3 mAh cm −2 at 1.6 mA cm −2 . Considering its traits of ultrahigh area capacity, excellent electronic/ionic transport and self-supporting characteristics, the 3D-MCC-LFP cathode combined with SnO 2 anode is surely promising for high performance lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·1969
·
IF 3.2
Ruixia Chu,Hongtao Zhang,Wanyou Huang,Fangyuan Qiu,Yan Wang,Zhenyu Li,Xiaoyue Jin
Lithium-ion batteries (LIBs) with high power, high capacity, and support for fast charging are increasingly favored by consumers. As a commercial electrode material for power batteries, LiFePO4was limited from further wide application due to its low conductivity and lithium-ion diffusion rate. The development of advanced architectures integrating rational conductive networks with optimized ion transport pathways represents a critical frontier in optimizing the performance of cathode materials. In this paper, a novel self-supporting cathode material (designated as LFP@LVP-CES) was synthesized through an integrated coaxial electrospinning and controlled pyrolysis strategy. This methodology directly converts LiFePO4, Li3V2(PO4)3, and polyacrylonitrile (PAN)) into flexible, binder-free cathodes with a hierarchical structural organization. The 3D carbon nanofiber (CNF) matrix synergistically integrates LiFePO4(Li/Fe/POx) and Li3V2(PO4)3(Li/V/POx) nanoparticles, where CNFs act as a conductive scaffold to enhance electron transport, while the POxpolyanionic frameworks stabilize Li+diffusion pathways. Morphological characterizations (SEM and TEM) revealed a 3D cross-connected carbon nanofiber matrix (diameter: 250 ± 50 nm) uniformly embedded with active material particles. Electrochemical evaluations demonstrated that the LFP@LVP-CES cathode delivers an initial specific capacity of 165 mAh·g−1at 0.1 C, maintaining 80 mAh·g−1at 5 C. Notably, the material exhibited exceptional rate capability and cycling stability, demonstrating a 96% capacity recovery after high-rate cycling upon returning to 0.1 C, along with 97% capacity retention over 200 cycles at 1 C. Detailed kinetic analysis through EIS revealed significantly reduced Rctand increased Li+diffusion. This superior electrochemical performance can be attributed to the synergistic effects between the 3D conductive network architecture and dual active materials. Compared with traditional coating processes and high-temperature calcination, the preparation of controllable electrospinning and low-temperature pyrolysis to some extent avoid the introduction of harmful substances and reduce raw material consumption and carbon emissions. This original integration strategy establishes a paradigm for designing freestanding electrode architectures through 3D structural design combined with a bimodal active material, providing critical insights for next-generation 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
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Shaoyan Huang,Huijuan Xiu,Dingwen Yin,Na Li,Sha Fan,Haiwei Wu,Mengxia Shen,Deliang Tian,Minzhe Wu,Jinbao Li
Lithium-sulfur batteries (LSBs) are gaining attention as a potential energy storage option due to their impressive theoretical specific capacity. However, the main challenges hindering its implementation include the expansion in volume of sulfur and lithium sulfide during the conversion process of charge-discharge, the limited conductivity of the active material, and specifically, the phenomenon known as shuttle effect caused by lithium polysulfides (LiPSs). The development of high-performance LSBs have led to the need for self-supporting cathode materials that can efficiently accommodate volume expansion, build up efficient conductive pathways, and suppress shuttle effects. The poly(3,4-ethylenedioxythiophene) (PEDOT) was synthesized in situ on cellulose nanofibers (CNFs), resulting in the formation of CNF@PEDOT. Subsequently, CNF@PEDOT was combined with plant fibers (PFs) and multi-wall carbon nanotubes (MWCNTs) to fabricate a self-supporting cathode featuring a multi-scale network structure denoted as CNF@PEDOT/MWCNT/PF/S. The PFs serve as the primary backbone network, CNF@PEDOT to form the secondary conductive network, and MWCNTs act as tertiary conducting networks. In fact, the design of multi-level conductive network effectively improves the conductivity of the material, and PEDOT can further adsorb and catalyze LiPSs. The incorporation of PFs significantly enhanced the mechanical robustness of the cathode and augmented its electrolyte permeability. The self-supporting CNF@PEDOT/MWCNT/PF/S cathode exhibits an initial capacity of 1204.6 mA h g −1 when loaded with 2.4 mg cm −2 of sulfur at a rate of 0.2 C. Notably, it maintains an initial discharge specific capacity of 712.9 mA h g −1 even when the sulfur load is increased to 4.3 mg cm −2 . This study presents a comprehensive framework for the development of self-supporting cathodes in LSBs.
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
Energy Storage Materials
·
2022
·
IF 20.831
Wen Ren,Mulan Qin,Yifan Zhou,Huang Zhou,Jue Zhu,Junan Pan,Jiang Zhou,Xinxin Cao,Shuquan Liang
The development of low-cost and long-lifespan cathode materials for sodium-ion batteries has been one of the key issues for the success of grid-scale energy storage. Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 has received a great deal of attention due to its high theoretical capacity, good structural stability, and high abundance of resources. Herein, hierarchical carbon decorated Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 nanofibers are designed and fabricated through a feasible electrospinning technique and subsequent pyrolysis. The free-standing Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 /C electrode exhibits good mechanical flexibility, together with high electronic conductivity and ultrafast Na + migration in sodium-ion batteries, leading to high reversible capacity (118 mA h g −1 at 0.2 C), superior cycling stability (79.6% of capacity retention over 10,000 cycles at 10 C) and excellent rate performance (64 mA h g −1 at 20 C). The full cell assembled with Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 /C cathode and hard carbon anode, shows reversible capacity of 126.4 mA h g −1 with high working voltage of 2.9 V at 20 mA g −1 . Such an effective concept of fabricating hierarchical carbon-decorated electrodes for SIBs is expected to accelerate the practical applications of high-rate flexible energy storage devices.
研究领域:
材料科学
·
储能技术
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2025
·
IF 4.2
Bingyan Li,Yinglin Yan,Xingsheng Zhang,Bing Ren,Zhiying Meng,Rongfu Xu,Yiming Zou,Qijiu Deng,Wei Yu,Xianhui Wang,Nana Zhao,Lisheng Zhong,Rong Yang,Yunhua Xu
Although lithium-sulfur (Li-S) batteries have broad market prospects owing to their high theoretical energy density and potential cost-effectiveness, their practical application still faces serious shuttle effects of polysulfides (LiPSs) and sluggish redox kinetics. In this study, a cobalt-organic framework, ZIF-67, decorated balsa wood matrix (ZIF-67/BW) was utilized to prepare a cobalt-nitrogen-encapsulated carbon host (Co-N/CBW) with dual-stage-order microchannels for self-standing cathodes in high-performance Li-S batteries. The first-stage-order microchannels inherited from wood provided fast transmission paths for electrolyte. The ZIF-67 derived Co-N carbon particles with the second-stage-order microchannels provided strong chemical adsorption and enhanced conversion kinetics for LiPSs. Owing to these advantages, the Co-N/CBW/Li 2 S 8 cathode exhibited a high initial discharge specific capacity of 1213.1 mAh g −1 at 0.1 C and good cycling stability at 0.5 C (590 mAh g −1 after 200 cycles). By increasing the sulfur loading to 5.97 mg cm −2 , the cathode maintained a remarkable area-specific capacity (3.42 mAh cm −2 ) after 100 cycles. This work proposes a strategy for the cooperation of the catalyst and matrix, providing more possibilities for the development of Li-S batteries.
研究领域:
储能
·
纳米材料
·
电化学
·
金属有机框架
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Shaoping Wu,Hongpeng Zheng,Nan Zhang,Weizheng Cheng,Hezhou Liu,Huanan Duan
Gel electrolyte composite with high areal capacity cathode effectively improves battery energy density and safety. Still, the insufficient interface contact between electrolyte and electrode limits the capacity release inside the thick cathode. Here, we rationally design a self-supporting cathode and use the in-situ polymerization method to integrate the gel electrolyte with the cathode. This cathode can effectively reduce the content of inactive electrode components. Meanwhile, the design of the regularly-arranged pore structure of the cathode introduced by laser texturing facilitates the penetration of the prepolymer solution and enables outstanding lithium-ion transport. Notably, the quasi-solid LiFePO 4 /Li half-cell with active material loading of 8 mg cm −2 exhibits good electrochemical performance (118.5 mAh g −1 after 100 cycles at 0.2C at room temperature). Moreover, when the loading of active materials increases to 30 mg cm −2 , the LiFePO 4 /Li 4 Ti 5 O 12 full-cell can still have a relatively high discharge capacity (105.9 mAh g −1 after 400 cycles at 0.2C at room temperature). It is worth noting that the quasi-solid pouch cell prepared by in-situ polymerization has a certain flexibility, indicating that this strategy has application potential in flexible electronic devices.
研究领域:
材料科学
·
电化学
·
电池技术
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）