SOLID STATE IONICS
·
2020
·
IF 3.107
Yuanyu Wang,Wenjun Zhu
Herein, porous Li 4 Ti 5 O 12 has been prepared by a facile sol-gel process with poly(ethylene oxide) used as a phase separation inducer, which presents a novel micro/nano structure with micro-sized secondary structure (2–5 μm) constructed by many interconnected nano-sized primary components (30–60 nm). As an anode material for lithium ion batteries , the as-prepared Li 4 Ti 5 O 12 exhibits good cycling stability and rate capability, which could be attributed to the unique porous micro/nano structure.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 3
·1148-1156
·
IF 3.442
Chen He,Yu Lanyong,Lin Zifeng,Zhu Qizhen,Zhang Peng,Qiao Ning,Xu Bin
MXenes are 2D transition metal carbides or nitrides with high electrical conductivity that have attracted great attention as promising electrode materials that supersede carbon-based material designed for supercapacitors. However, the aggregation and self-restacking of MXene 2D nanosheets limit their high-rate performance. In this work, flexible and conductive Ti 3 C 2 T x MXene/carbon nanotubes (CNTs) composite film was prepared through a simple vacuum filtration of the Ti 3 C 2 T x MXene and CNTs suspension mixture. The CNTs integrated MXene nanosheets can effectively prevent the restacking while creating fast ion transport channels for enhanced capacitance. The designed films exhibit excellent performance as supercapacitor electrodes with high capacitance of 300 F g −1 at 1 A g −1 with superior rate performance of 199 F g −1 even at 500 A g −1 , together with excellent cyclic stability of 92% capacitance retention after 10000 cycles at 20 A g −1 . The excellent workability demonstrates potential application of the system for flexible, portable and highly integrated supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 8
·3001-3012
·
IF 2.8
Tang Haoqing,Zhao Siying,Weng Qiang,Liu Tao,Tang Zhiyuan,Liu Xiaotong
A novel strategy to improve the ionic conductivity of the Li 2 ZnTi 3 O 8 (LZTO) anode is proposed by embedding exfoliation and exchange of Li + montmorillonite (MMT) in LZTO particles. Li 2 ZnTi 3 O 8 and montmorillonite (LZTO-MMT) composites are shown to induce not only a high concentration of Li + in the interlamellar channel of MMT but also a reduction in the distance for Li + migration to ensure fast and stable Li + diffusion kinetics. Furthermore, the thus obtained LZTO and 6 wt% MMT (LZTO-6MMT), composed of fast Li + conductor MMT, exhibits increased Li + conductivities, excellent high-rate Li + storage capacities, and significant improvement in cycle reversibility. The LZTO-6MMT electrode delivers 219.6 mAh g −1 at a current density of 1.0 A g −1 after 500 cycles and shows an excellent high-rate performance of 127.8 and 112.0 mAh g −1 over 2000 cycles at 5.0 and 10.0 A g −1 , respectively. X-ray photoelectron spectroscopy and ex situ Raman spectrum analyses suggest that the chemical bonds and crystal structure remain stable after multiple Li + intercalation/deintercalation processes. To the best of our knowledge, this is the first report on the introduction of fast-ion conductor MMT into LZTO and its application to lithium-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Ting He,Jianrui Feng,Jiajia Ru,Yutong Feng,Ruqian Lian,Jinhu Yang
Interfacial engineering plays an important role in tuning the intrinsic property of electrode materials for energy applications such as lithium-ion batteries (LIBs), which however is rarely realized to amorphous electrode materials, despite a set of characteristics of amorphous materials desirable for LIBs. Here, Au atomic cluster layer-interfaced amorphous porous CoSnO3 nanocubes were fabricated by galvanic replacement and employed as a superior LIB anode, showing high reversible capacity (1615 mAh g–1 at 0.2 A g–1), good rate capability (1059 mAh g–1 with a 61.3% capacity retention upon the dramatic current variation from 0.1 to 5 A g–1), and excellent cycling stability. The amorphous nature, interconnected mesopores, and especially the thin Au atomic cluster layer on the surface/pore walls of CoSnO3 nanocubes can not only improve electron transport and ion diffusion in the electrode and electrolyte but also release the volume strain. Most significantly, density functional theory calculations reveal that the CoSnO3∥Au heterointerface can induce the atomic polarization of CoSnO3 and lower Li ion diffusion barriers in CoSnO3 near the heterointerface, endowing it with a significantly enhanced theoretical lithium storage capacity and outstanding rate capability. This study provides a model of a heterointerface for amorphous materials with desired properties for high-performance LIBs and future energy applications.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2022
·Vol. 41
·期 8
·2645-2654
·
IF 6.318
Cheng Shu-Ling,Yin Xiu-Ping,Sarkar Samrat,Wang Zhen-Wei,Huang Qiu-An,Zhang Jiu-Jun,Zhao Yu-Feng
Anode materials of lithium-ion batteries (LIBs) endowed with high-rate performance and fast charging capability are crucial for future energy storage systems. Here, Mo 8.7 Nb 6.1 O x @NCs (nitrogen-doped carbon nanotubes, NCs) egg-nest structure synthesized by an in-situ solvothermal method is reported. The Mo 8.7 Nb 6.1 O x @NCs egg-nest exhibits high embedding potential, high pseudo-capacitance contribution rate (87.5%), and low charge transfer resistance. The electrochemical results show that Mo 8.7 Nb 6.1 O x @NCs demonstrates excellent rate performance (reversible capacity of 196.8 mAh·Ag −1 at 10 A·Ag −1 , and full charging only takes 1.1 min) and excellent cycle stability (reversible capacity of 513 mAh.Ag −1 at 0.5 A.Ag −1 combined with a capacity loss of only 5.4% after 100 cycles), outperforming the state-of-the-art literature. The full cell is assembled with Mo 8.7 Nb 6.1 O x @NCs as the anode and LiFePO 4 as the cathode, which can provide a remarkably high energy density of 731.9 Wh·kg −1 , indicating its excellent prospect for practical applications. Graphical abstract
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Kaite Peng,Xiaoyan Wang,Zhiyong Wang,Xianbo Jin
Advanced thermal batteries require new cathode materials with high thermal stability, high capacity, high voltage, and high-rate performance. Although antimony sulfide (Sb 2 S 3 ) has a high theoretical capacity, its low melting point characteristic hinders the application in thermal batteries. Here, we demonstrate that modifying with a small amount of graphite can effectively immobilize liquid Sb 2 S 3 to form a pellet electrode, which allows us to use cathodes made of this liquid active material just like traditional solid-state electrodes. The formation of such a solid-like liquid cathode can be attributed to graphite's affinity for Sb 2 S 3 while repelling the molten electrolyte. The electrochemical testing in LiCl-KCl eutectic at 560 °C and 600 °C indicates that, the performance of the graphite modified Sb 2 S 3 (gra@Sb 2 S 3 ) of optimized proportions far surpasses that of traditional FeS 2 , both in terms of discharge capacity and thermal stability. This study provides a strategy for developing new kind of liquid cathode materials for high-performance thermal batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Gaobang Chen,Yong Fan,Tianhui Yu,Muhammad Shoaib,Azim Khan,Yifan Liu,Xian Jian
The practical application of high-rate lithium/fluorinated carbon (Li/CF x ) primary batteries faces challenge of relatively slow electrode reaction kinetics limited by inert C-F bond and strong polarity. Herein, an effective microwave-induction strategy was developed to regulate C-F bond for 80C high-rate Li/CF x battery with suppressed polarization. The as-mentioned microwave method was carried out in the alcohol-based solvent for uniformly modify CF x , including precise defluorination, C-F bond regulation, surface functional groups and carbon quantum dots. Precise defluorination contains the conversion of C-F bond to semi-ionic C-F bond while preserving C-F 2 and C-F 3 . During the process of C-F bond regulation, hydroxyl groups is grafted onto the surface of CF x to increase the wettability and electronegativity of the electrode. Compared with raw CF x , the Li/CF x batteries using microwave-modified CF x achieved high discharge rate of 80C possessing a high power density of 134.091 kW/kg. In addition, the optimal Li/CF x battery possesses a large specific capacity increase ratio of 142.6 % at 50C. This microwave-induction approach for modifying CF x in ethanol-based solvent provides a facile and effective pathway to design high-rate Li/CF x 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 Storage
·
2024
·
IF 8.9
Yifei Chen,Meng Li,Qin Zhu,Wei Bai,Xiaofang Liu,Mingwu Xiang,Junming Guo,Jintao Liu
The Jahn-Teller effect and Mn dissolution always restrict the practical electrochemical properties of spinel LiMn 2 O 4 cathode material. Herein, a low-temperature solid-state combustion method is employed to synthesize various truncated octahedral LiZn 0.03 Al x Mn 1.97- x O 4 ( x ≤ 0.08) with submicron structure. The Zn/Al dual-doping is conducive to forming {110} and {100} planes, and is also beneficial to the crystal development of LiMn 2 O 4 . It is found that as the amount of Al doping increases, the average particle size gradually decreases from 188 nm to 113 nm. In addition, the Zn/Al co-doping integrated with small particles can improve the high-rate performance. The optimal LiZn 0.03 Al 0.03 Mn 1.94 O 4 exhibits submicron truncated octahedral morphology, high crystallinity , and good particles dispersibility . Benefiting from these structure merits, the LiZn 0.03 Al 0.03 Mn 1.94 O 4 delivers the first discharge capacity of 113.1 mAh⋅g −1 and low capacity fade of 9.9 % after 300 cycles at 1C. It also shows the high first discharge capacity of 86.6 mAh⋅g −1 at 10C and the high capacity retention of 72.1 % after 2000 cycles. Even at ultrahigh current density of 15C and 20C, the ultralong cycling lifespans over 2000 cycles are also achieved in LiZn 0.03 Al 0.03 Mn 1.94 O 4 cathode material. The excellent electrochemical properties are ascribed to its relatively high Li + diffusion coefficient (1.60 × 10 −11 cm 2 ⋅s −1 ) and low apparent activation energy (25.45 kJ⋅mol −1 ) during the de-intercalation process. The Zn/Al dual-doping and submicron truncated octahedron designs of the LiMn 2 O 4 provide a scientific reference to prepare high-performance cathode materials.
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 Materials Chemistry A
·
2017
·Vol. 5
·期 38
·20217-20227
·
IF 8.867
Wenbin Li,Jianfeng Huang,Liangliang Feng,Liyun Cao,Yongqiang Feng,Haijing Wang,Jiayin Li,Chunyan Yao
The meticulous design of coating structures is an efficient approach for enhancing the cycle life and rate capability of electrode materials. Herein, crystalline VOOH-coated VS2 microflowers (c-VS2@VOOH) constructed from nanosheets are successfully prepared by a facile one-step hydrothermal method. The c-VS2@VOOH composite as a sodium ion battery anode material delivers an excellent cycling stability of 330 mA h g−1 after 150 cycles at 0.2 A g−1. In particular, c-VS2@VOOH can still afford a high reversible capacity of 356 and 224 mA h g−1 even at 0.5 and 1.0 A g−1, respectively. The high capacity, good stability and enhanced rate capability are mainly attributed to the highly efficient surface sensitization and protection by crystalline VOOH, which can improve sodium ion diffusion and suppress the pulverization of VS2 nanosheets.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Linfeng Chen,Hongyang Li,Pengsen Qian,Yuqi Wang,Jianjun Zhang,Gaoran Li
Tin oxide, characterized by its exceptional theoretical capacity, emerges as a highly promising alternative anode in the pursuit of high-energy-density lithium-ion batteries (LIBs). However, inherent limitations in conductivity and structural integrity impede the fulfillment of its energy storage potential. Herein, sophisticated SnO 2 -carbon nanorods (SnO 2 /C NRs) derived from a tin-based metal-organic framework are developed for superior lithium storage. The ultrafine SnO 2 nanocrystals are embedded within a hollow and porous rod-like architecture, ensuring fast multidirectional charge transfer and well-accommodated volume variation during the lithiation/delithiation process. Moreover, the integration of the carbon matrix further promotes electron conduction and reinforces the structural integrity towards fast, efficient, and durable electrochemistry. As a result, the SnO 2 /C NRs electrodes demonstrate excellent long-term cyclability with a minimal capacity fading rate of 0.089 % per cycle over 500 cycles, and a commendable rate capability with a highly reversible capacity of 922.1 mAh g −1 at 3 C. This work establishes a unique and insightful paradigm for designing advanced electrode materials towards energy-dense next-generation LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Ningyun Hong,Kang Wu,Zhengjun Peng,Zenghu Zhu,Guofeng Jia,Min Wang
O3-type layered transition metal oxides have shown great promise as high-capacity cathode materials for sodium-ion batteries in large-scale energy storage, due to their low cost and the abundance of sodium resources. However, the limited interlayer spacing and the unstable structure of the O3 phase result in inferior cycling stability and poor rate capability, which could even hinder their practical application process. Hereby, we present that doping with nonelectrochemically active Al in NaAlx(Ni0.5Mn0.5)1–xO2 (x = 0, 0.02, 0.06, 0.1) can effectively alleviate these issues. Among these materials, materials with x = 0.02 exhibited the best electrochemical behavior with improved capacity and better cycling property than other materials. Specifically, the discharge capacity of a 2 mol % Al-doped material possesses 63.2% capacity retention after 200 cycles at a current density of 240 mA g–1, which is 21.4% higher than that in NaNi0.5Mn0.5O2. In addition, a 2 mol % Al-doped electrode also shows outstanding rate capability and delivers 90 mAh g–1 at a high rate of 480 mA g–1, compared to only 67 mAh g–1 for that of the pristine one. X-ray diffraction (XRD), cyclic voltammetry (CV), and galvanostatic intermittent titration technique (GITT) analysis elucidated that the introduced Al dopant can effectively improve the structural stability and promote kinetics of Na+ diffusion mobility. Therefore, the strategy of doping inactive aluminum elements for optimizing the electrochemical performance of NaNi0.5Mn0.5O2 was verified, which could also open an avenue for the design of other O3-type sodium cathode materials.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Dehai Meng,Haozhi Duan,Shijie Wu,Xiaodan Ren,Shuxia Yuan
Lithium iron phosphate (LiFePO 4 ) is one of the most important cathode materials for high-performance lithium-ion batteries in the future due to its high safety, high reversibility, and good repeatability. However, high cost of lithium salt makes it difficult to large scale production in hydrothermal method . Therefore, it is urgent to reduce production costs of LiFePO 4 while maintaining the unique advantages of hydrothermal methods. In this work, the lithium iron phosphate powders (LFP-twi) with low Fe-Li anti-site defect concentration and inhibition along the direction [010] was constructed by hydrothermal reaction with low lithium usage. As a result, this allows the material to have an excellent reversible capacity (163.6 mAhg −1 at 0.1 C), ultra-high-rate capability (120 mAhg −1 at 10 C), and noticeable low-temperature performance (130 mAhg −1 at - 20 ℃ and 0.1 C). These findings open a new avenue for the development of high-density current and low-temperature resistant LiFePO 4 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）