International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hongdong Liu,Zhongli Hu,Yongyao Su,Rong Hu,Liangliang Tian,Lei Zhang,Haibo Ruan
Manganese dioxide (MnO 2 ) has been studied as an anode material for Li-ion batteries beyond its high theoretical specific capacity and low-cost. In this work, the 1D α-MnO 2 nanomaterials with different morphology were synthesized via a facile and green hydrothermal method. These materials are carefully investigated by XRD, Raman, SEM and BET techniques. The results show that the solution acidity strongly influenced the morphology and the specific surface area of the sample. The electrochemical behaviors of MnO 2 sample were systematically investigated by cyclic voltammetry and galvanostatic charge-discharge. As anode materials for Li-ion batteries, both of 1.2-MnO 2 and 3.6-MnO 2 deliver high initial discharge capacity and relatively excellent cycle performance, indicating that 1D α-MnO 2 is a promising anode material for high-performance lithium ion batteries.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bo Wang,Wei Guo,Yongzhu Fu
Lithium–sulfur (Li–S) batteries are promising to enable high-energy-density storage systems; however, their commercialization is hampered by several technical challenges such as polysulfide shuttle and safety issues related to the lithium metal anode. Herein, we use anodized aluminum oxide (AAO) membranes as separators in Li–S batteries for the first time. AAO membranes are rigid and nonflammable, which is helpful for improving battery safety. The aligned and uniform channels within AAO membranes provide fast pathways for lithium ion transport, leading to low areal specific resistance due to the electroosmotic flow of lithium ions in nanoscaled channels. In addition, the AAO separator leads to low overpotential during lithium deposition/stripping in lithium symmetric cells. The Li–S cells with AAO separators show better cycling performance than those with Celgard ones, in particular, at high C rates. At the 2 C rate, the cell shows a battery performance of 480 cycles with a capacity degradation rate of 0.105%, which is much better than that when the Celgard separator is used. This work demonstrates that AAO membranes are promising separators with unique properties for improving the performance of Li–S batteries.
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 10
·4127-4134
·
IF 2.817
Guan Dichang,Huang Yong,He Meimei,Hu Guorong,Peng Zhongdong,Cao Yanbing,Du Ke
All-solid-state Li-ion batteries (ASSLBs) are promising systems to power electronic devices and electric vehicles for their high-energy density and safety. PEO-based composite electrolytes containing lithium salts and various fillers have been regarded as the most attractive solid electrolytes for ASSLBs due to their high interfacial compatibility with electrodes, high mechanical flexibility, and easy fabrication. For PEO/lithium salt/ceramic composite electrolytes, both “ceramic-in-polymer” and “polymer in ceramic” can be applied to solid-state batteries. “Ceramic-in-polymer” can provide high ionic conductivity but narrow electrochemical window; “polymer in ceramic” can provide wide electrochemical window but low ionic conductivity. In order to combine the high conductivity of “ceramic in polymer” with the wide electrochemical window of “polymer in ceramic,” we designed multilayer PEO/ Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) composite electrolytes with low content of LLZTO (10wt %) in the inside layer and high content of LLZTO (40wt %) in the surface layer (PCEs-40–10-40) by a simple solution casting method. The PCEs-40–10-40 showed high ionic conductivity(4.61 × 10 –4 \({\mathrm{S}\cdot \mathrm{cm}}^{-1}\) ) and a wide electrochemical window(> 5.1 V) at 60 ℃. Compared with monolayer composite electrolytes, solid-state LiFePO 4 |Li batteries with multilayer composite electrolytes showed much better cycling stability (capacity retention of 98.8% after 200 cycles) at 0.5C and 60 ℃. This work shall give practical insights for the applications of PEO-based composite electrolytes.
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Qiuyan Bi,Shiai Xu
A positively charged PI/PDA/PEI nanofiltration membrane was prepared in this study by crosslinking between polyethyleneimine (PEI) and poly(dopamine) (PDA) on the polyimide (PI) support membrane for separating Mg 2+ and Li + from MgCl 2 /LiCl mixed solution, and its chemical structure, surface properties, and separation performance were investigated. The results indicate that the PI/PDA/PEI membrane has a thin positively charged layer and shows excellent rejections against many inorganic salts [MgCl 2 (93.1%) > MgSO 4 (86.5%) > Na 2 SO 4 (74.7%) > LiCl (37.6%)]. More importantly, the membrane exhibits long-term stability and good separation of Mg 2+ and Li + , and the Mg/Li ratio of the permeate of brine obtained from West Taijnar salt lake can be reduced from 65.3 to 5.0 at pH 6.5 by filtration.
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DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 3
·1006-1016
·
IF 9.6
Chen Xin-Yang,Gao Xue-Jie,Wu Han-Yan,Liu Yu-Long,Yang Xiao-Fei,Sun Run-Cang
Quasi-solid-state lithium metal batteries (QSSLMBs) assembled with polyvinylidene fluoride (PVDF) are a promising class of next-generation rechargeable batteries due to their safety, high energy density, and superior interfacial properties. However, PVDF has a series of inherent drawbacks such as low ionic conductivity, ease of crystallization, and hydrophobic character that leading to poor cell properties. To tackle these issues, a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of QSSBs. The lithophilic polar groups of lignin can promote uniform deposition of Li on the electrodes. Cooperating with the improved mechanical properties can efficiently prevent Li dendrites penetration through the separator. In addition, more active sites provided by lignin can also enhance Li + transport and lead to a faster electrochemical reaction kinetic. Benefitting from the ingenious design, Li symmetric cells with 5% lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm −2 /5 mAh·cm −2 , while short-circuiting occurs after 56 h for the counterpart (pure PVDF). Moreover, a full cell of Li/5% lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g −1 after 2000 cycles at 10 C. This work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs. Graphical abstract
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DOI
高影响因子
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
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
·
电化学
·
储能技术
·
全固态电池
·
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
·
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
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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
·
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
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DOI
高影响因子
危险品化学品经营许可证（带存储）