Journal of Energy Storage
·
2026
·
IF 10.7
Jiashi Liu,Jiacai Xiong,Yutao Xing,Chunhai Jiang,Zhimin Zou
Although silicon-based anode materials offer significantly higher specific capacity than graphite, their practical applications are limited by drawbacks such as large volume expansion, poor cycling stability and high production costs. Integrating transition metal oxides with silicon, coupled with a carbon coating layer, has been proven of effectiveness in enhancing the cycle stability of silicon-based anodes. Here we report the synthesis of a composite anode by combining tin(II) oxide (SnO) with waste silicon powder (wSi) of photovoltaic industry and introducing a carbon coating via in situ polymerization of resorcinol-formaldehyde followed by thermal pyrolysis. The resulting wSi/SnO@C composite anode exhibits improved rate and cycle performance, as characterized by a high reversible capacity of 1590 mAh g −1 at 3 A g −1 and a high retained capacity of 601 mAh g −1 after 500 cycles at 0.5 A g −1 . Mixing the wSi/SnO@C composite with graphite at an appropriate mass ratio yields a practical applicable anode with robust cycle stability. Ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses reveal that SnO is irreversibly reduced to metallic Sn during the first discharge, which is then partially converted to SnF 2 together with the formation of Li x Sn alloy. The formed SnF 2 is supposed to enhance the stability of the solid-electrolyte interphase (SEI) and reduce the attack of electrolyte to Si particles, both contributing to the improved cycle stability. This work demonstrates that SnO-decorated Si@C composites hold a high promise as anode materials of lithium-ion batteries towards enhanced cycle life and power density.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 34
·18477-18487
·
IF 12.732
Menghua Yang,Xuewei Wang,Jinfeng Wu,Yue Tian,Xingyu Huang,Ping Liu,Xianyang Li,Xinru Li,Xiaoyan Liu,Hexing Li
Lithium sulfur (Li–S) batteries have been investigated as ideal candidates for future high-density energy storage systems with the advantages of abundant reserves, high energy density and competitive cost. The key issues are the severe shuttling of polysulfides and sluggish redox kinetics. Herein, we report a novel metal–organic framework-derived Co2P–ZnS/ZnS–C nanocomposite constructed from inner Co2P–ZnS and outer ZnS–C heterostructures. Both the experimental results and theoretical calculations demonstrated that these dual electrocatalytic heterostructures enabled strong affinity with polysulfides and facilitated the reaction kinetics. Meanwhile, the hollow carbon polyhedron provided fast electron/ion transfer channels and effectively buffered volume expansion during cycling. As anticipated, a high initial capacity of 1503 mA h g−1 was achieved at 0.2C with Co–Zn/Zn–C/S as a cathode, together with excellent stability after 500 cycles at 1C. Even a high reversible capacity of 540 mA h g−1 was achieved at 1C after 200 cycles under an elevated sulfur loading of 3.65 mg cm−2. This work presents a new strategy for designing dual electrocatalytic hosts for immobilization and conversion of polysulfides, which may offer more opportunities as cathodes in stable Li–S batteries with high energy density.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Huajun Xu,Jiaxing Fan,Di Pang,Yingying Zheng,Gang Chen,Fei Du,Yury Gogotsi,Yohan Dall'Agnese,Yu Gao
Ferric vanadate (FeVO 4 ) is a desirable anode candidate for lithium-ion battery (LIB) and sodium-ion battery (SIB) because of its high theoretical capacity, low cost and ease of synthesis. However, its practical application is hindered by its volume expansion during the Li + /Na + insertion/extraction and low electronic conductivity. Herein, flexible and free-standing FeVO 4 /Ti 3 C 2 T x (FVO/MX) films have been made via combining FeVO 4 nanorods and Ti 3 C 2 T x MXene sheets via a simple method of vacuum assisted filtration. In the composite films, Ti 3 C 2 T x sheets act as host and FeVO 4 nanorods are uniformly deposited onto the layers. FeVO 4 nanorods are encapsulated by Ti 3 C 2 T x sheets, forming a three-dimensional network sandwich structure. The binder-free FVO/MX films exhibited superior electrochemical performance due to the synergyy between FeVO 4 and Ti 3 C 2 T x . Specifically, when FVO/MX electrode was used in a lithium-ion battery, it delivered reversible capacity of 1179 mAh g −1 and 1125 mAh g −1 after 250 cycles at a current density of 0.1 A g −1 . Besides, the FVO/MX = 2:1 anode delivered a reversible capacity of 428 mAh g −1 at 5 A g −1 and 69.5% capacity was retained after 2500 cycles. Moreover, the Na-ion storage capacity reaches 129 mAh g −1 at a high current density of 5 A g −1 , showing capacity retention of 81.1% after 5000 cycles. The charging and discharging mechanism of the FVO/MX based lithiumion battery was studied by in-situ XRD technique. Owing to high metallic conductivity and 2D morphology of Ti 3 C 2 T x MXene, 3D networks can be constructed by combining other active agents, suggesting that MXene is a promising host material for the next-generation flexible energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
eTransportation
·
2023
·
IF 11.9
Fengmei Song,Zhixuan Wang,Guochen Sun,Tenghuan Ma,Dengxu Wu,Liquan Chen,Hong Li,Fan Wu
Organic cathodes show promising advantages of extensive resources, high theoretical specific capacity, and mild synthesis conditions, etc., but suffer from low density, poor electronic conductivity, and high solubility in liquid electrolytes. Herein, an in-situ coating method is developed to overcome the above issues by realizing high-performance sulfide all-solid-state batteries with organic Li 4 C 8 H 2 O 6 cathode. Li 4 C 8 H 2 O 6 composite cathodes with carbon nanotubes (CNTs) and vapor grown carbon fiber (VGCF) were systematically studied to reveal that CNTs accelerate the electrochemical decomposition of sulfide electrolyte, despite the effectively improved electronic conductivity, rate capability and active material utilization. Therefore, in-situ coating of Li 4 C 8 H 2 O 6 onto CNTs (Li 4 C 8 H 2 O 6 @CNT) is developed to further improve the contact between Li 4 C 8 H 2 O 6 and CNTs, but to reduce the contact of CNTs with sulfide solid electrolyte and its decomposition. As a result, the Li 4 C 8 H 2 O 6 @CNT electrode demonstrates a high capacity of 200.3 mAh/g, and a high active material utilization rate (83.4% at 0.1C). It also exhibits a specific capacity of 85.9 mAh/g at a high cathode loading of 40 wt% and a high rate of 1C.
研究领域:
材料科学
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电化学
·
储能技术
·
全固态电池
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纳米材料
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2019
·Vol. 23
·期 11
·3145-3151
·
IF 2.531
Xu Xiaoyan,Cheng Jun,Li Yuanyuan,Nie Xiangkun,Dai Linna,Ci Lijie
As high energy density and enhanced safety are required for the lithium-ion battery development, all-solid-state battery has attracted significant attention. Herein, we report an all-solid-state full battery consisting of a Li 7 P 3 S 11 solid electrolyte coated silicon anode, Li 2 S/graphene composite cathode, and Li 7 P 3 S 11 solid-state electrolyte. With a high capacity for the silicon anode and Li 2 S cathode, this battery yields a high theoretical specific energy density up to 1495 Wh kg −1 , which is higher than that of lithium-ion batteries based on oxide cathodes. Moreover, Li 2 S cathode is used as lithium source instead of using metallic lithium, avoiding interface reaction between lithium metal anode and sulfide electrolyte Li 7 P 3 S 11 . This all-solid-state battery system we proposed could avoid the safety issues associated with the use of lithium metal and be a promising candidate for an enhanced energy density, which would promote their applications in the fields of electric vehicles and portable electronics.
研究领域:
材料科学
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储能
·
电化学
·
电池技术
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DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Shi-jie LU,Yang LIU,Zhen-jiang HE,Yun-jiao LI,Jun-chao ZHENG,Jing MAO,Ke-hua DAI
Single-crystal Ni-rich cathode material LiNi 0.88 Co 0.09 Al 0.03 O 2 (SC) was synthesized by a high-temperature solid-state calcination method. Physicochemical properties of primary and delithiated SC samples were investigated by X-ray diffractometry, X-ray photoelectron spectroscopy, and transmission electron microscopy. Electrochemical performance was characterized by long-term cycling, cyclic voltammetry, and in-situ impedance spectroscopy. The results indicated that high temperature rendered layered oxides to lose lithium/oxygen in the interior and exterior, and induced cationic disordering. Besides, the solid-phase synthesis process promoted phase transformation for electrode materials, causing the coexisting multi-phase in a single particle. High temperature can foster the growth of single particles, but it caused unstable structure of layered phase.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 3
·2327-2333
·
IF 2.324
Cao Renping,Xiao Hui,Zhang Falin,Cheng Xinyu,Su Lei,Xiao Fen,Luo Zhiyang,Chen Ting
A series of CaZrO 3 :Bi 3+ , CaZrO 3 :Eu 3+ , CaZrO 3 :Eu 3+ , Bi 3+ , and CaZrO 3 :Eu 3+ , Bi 3+ , Li + phosphors are synthesized by high-temperature solid-state reaction method in air. Their luminescence properties are researched, compared, and analyzed. CaZrO 3 :Bi 3+ phosphor under excitation at 310 nm emits deep-blue light with chromaticity coordinate (0.1612, 0.0254). CaZrO 3 :Eu 3+ phosphor under excitation at 310 and 395 nm shows red-emitting with chromaticity coordinate (0.6386, 0.3611). CaZrO 3 :Eu 3+ , Bi 3+ phosphor under excitation at 310 nm exhibits a systematically varied hue from deep-blue to red light by changing Eu 3+ ion concentration, and that with excitation at 395 nm only emits red light with chromaticity coordinate (0.6386, 0.3611). The energy transfer process from Bi 3+ to Eu 3+ ions may be indicated by their spectral properties. The optimal Eu 3+ and Bi 3+ ions concentrations are 5 mol% and 0.9 mol%, respectively. The emission intensity CaZrO 3 :Eu 3+ , Bi 3+ phosphor may be enhanced about 1.6 times due to the co-doping Li + ion as charge compensator role. The luminous mechanism of CaZrO 3 :Eu 3+ , Bi 3+ phosphor is explained by the simplified energy level diagrams of Bi 3+ and Eu 3+ ions.
研究领域:
材料科学
·
无机化学
·
固体物理
·
发光材料
·
光电功能材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Zhixia Zhang,Long Zhang,Yanyan Liu,Chuang Yu,Xinlin Yan,Bo Xu,Li-min Wang
Li 6 PS 5 X (X = Cl, Br, I) argyrodites possess high ionic conductivity but with rather scattered values due to various processing conditions. In this work, Li 6 PS 5 X solid electrolytes were prepared by solid-state sintering or mechanical alloying and optimized with or without excess Li 2 S. Solid-state sintering prefers excess Li 2 S, whereas mechanical alloying prefers stoichiometric Li 2 S to synthesize high-purity samples with high ionic conductivity. Solid-state sintering is also more suitable than mechanical milling for high ionic conductivity. Li 6 PS 5 Cl with the highest ionic conductivity among Li 6 PS 5 X was comprehensively characterized for electrochemical performance and air stability. MoS 2 /Li 6 PS 5 Cl all-solid-state batteries assembled with Li 6 PS 5 Cl-coated MoS 2 as cathode and with Li 6 PS 5 Cl as solid electrolyte demonstrate high capacity and good cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Chaolumen Wu,Haibin Wang,Chenbo Liao,Jun Yang,Lei Li
A hybrid air-electrode composed of a mixture of fluorinated carbon (CF x ) and Ketjen black (KB) active carbon composite materials was prepared to improve performance of Li-O 2 battery . In the hybrid air-electrodes, four kinds of CF x materials including fluorinated graphite, fluorinated carbon fiber, fluorinated coke and fluorinated black carbon were utilized as lithium insertion materials. The physical properties and morphologies of the KB and CF x carbon materials were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM) measurements. Compared with the conventional KB air-electrode, all the CF x /KB hybrid air-electrodes in Li-O 2 batteries showed higher specific discharge capacity, especially at high current density . Among these CF x /KB hybrid air-electrodes, the fluorinated graphite based electrode showed the best electrochemical performance in Li-O 2 battery due to its highest discharge capacity of the fluorinated graphite material in the Li/CF x primary battery, highest specific surface area, and highest total pore volume . The electrochemical performance of Li-O 2 and Li-air batteries using the hybrid air-electrodes with the different fluorinated graphite: KB weight ratio, including specific charge and discharge capacity, cycling stability and rate capability were systematically investigated. At a current density of 0.5 mA cm −2 , the fluorinated graphite based air-electrode delivered a high specific discharge capacity of 1138 mAh g −1 in Li-O 2 batteries, which was more than four times than that of the conventional KB air-electrode (265 mAh g −1 ) under same testing conditions. The battery assembled with the fluorinated graphite based air-electrode exhibited better cycling stability than that of the battery assembled with the conventional KB air-electrode.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Qinhua Gu,Yujie Qi,Wuxing Hua,Tongxin Shang,Junnan Chen,Luozhen Jiang,Lina Li,Ming Lu,Yixiao Zhang,Xi Liu,Ying Wan,Bingsen Zhang
The shuttle effect caused by soluble lithium polysulfides (LiPSs) deteriorates multiphase transformation reaction kinetics of sulfur species, and gives rise to an unserviceable lithium-sulfur (Li-S) battery. Catalysis, as a process optimization approach, offers an option to eliminate the intrinsic issues. However, exploring and understanding the role of catalysts on electrode reaction remains critical bottlenecks, particularly as they are prone to continuous evolution under complex dynamic environment. Herein, platinum nanoparticles loaded on MXene nanosheets, as sulfur host, and the action of catalysts on the reaction process are investigated via ex-situ monitors upon solid–liquid–solid chemical transformation of sulfur species. These traces confirm that the high performance originates from electron transfer between catalysts and LiPSs, which lowers the nucleation barrier from liquid LiPSs to solid Li 2 S/Li 2 S 2 . Further, the accelerated liquid–solid conversion can alleviate the accumulation of LiPSs, and boost the reaction kinetics in Li-S batteries. The findings corroborate the electronic modulation between catalysts and LiPSs, which is a generalizable strategy to optimize energy conversion efficiency of Li-S batteries.
研究领域:
电化学
·
能源材料
·
纳米催化
·
电池化学
·
表面科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yuhong Ma,Yu Jiao,Yichao Yan,Wei Chen,Yaoyao Li,Mingjie Zhou,Dongjiang Chen,Jun Zhu
Solid polymer electrolytes drastically enhance the operational safety of Li metal battery by eliminating the flammable liquid electrolyte, but still suffer from low ionic conductivity and inferior thermostability. Herein, we tack this issue by strengthening the polyvinylidene fluoride matrix with lithiophilic polyimide . The actively conjugated carbonyl groups in polyimide polymer backbone with Li + -conductivity feature accelerate the ion conduction, accordingly improving the ionic conductivity up to 4.1 × 10 −4 S cm −1 . With the polyimide solid electrolyte , lithium symmetrical battery shows a stable operation without obvious dendrite growth over 300 h at 0.17 mA cm −2 , effectively uniformizing the Li + deposition at the electrolyte/anode interface. The LiFePO 4 cell based on the polyimide electrolyte delivers a high discharge capacity of 126 mAh g −1 at 25 °C with a capacity retention of 86% after 500 cycles at 0.15 mA cm −2 . In addition, polyimide chain with high thermostability owns affinity to polyvinylidene fluoride with an adsorption energy of 0.1 eV, giving rise to 35% enhancement in mechanical strength and 68% reduction in thermal shrinkage at 300 °C as compared with pure polyvinylidene fluoride electrolyte. This design allows a promising route for enhancing the safety operation of polymer electrolyte and promoting ionic transfer by reconstructing the polymer architecture .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Hongsen Hui,Huiying Ding,Quan Liu,Haisong Zhao,Jian Hou,Lei Zhang,Hongchang Pei,Xianhui Li
Polyamide thin film composite (TFC) nanofiltration (NF) membrane possessing excellent permeance and monovalent/multivalent ions selectivity is eager for Mg 2+ /Li + separation. To achieve this purpose, we developed a TFC NF membrane with high water permeance, Mg 2+ rejection, as well as satisfied Mg 2+ /Li + separation factor by conducting the interfacial polymerization (IP) with polyethyleneimine (PEI600) and 1,3,5,-benzenetricarbonyl (TMC) on a positively charged interlayer constructed on PES/SPSF blending ultrafiltration substrate. On the one hand, the hydrophilic electropositivity interlayer can increase aqueous monomer adsorption capacity and inhibit the monomer diffusion rate, facilitating the formation of a thin separation layer. Therefore, the obtained NF-8 membrane exhibits the highest permeance of 8.8 L m −2 h −1 bar −1 , which is 2.8 times compared with the NF-0 membrane (3.1 L m −2 h −1 bar −1 ) prepared on PES-based substrate. On the other hand, the positively charged interlayer also imparts the NF-8 membrane a higher isoelectric point (IEP) of 7.9, as well as satisfied Mg 2+ rejection of 97.1 % and Mg 2+ /Li + separation factor of 87.1. This work demonstrates that the water permeance and ions selectivity of the TFC NF membrane can be enhanced by constructing a positively charged interlayer.
研究领域:
材料科学
·
膜分离技术
·
化学工程
·
环境科学
·
能源材料
·
无机非金属材料
·
功能高分子材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）