Materials
·
2024
·Vol. 17
·期 18
·4473
·
IF 3.1
Junlong Luo,Jun Cai,De Gong,Aoping Guo,Jaw-Kai Wang,Jiangtao Zhang
Pursuing improved electrode materials is essential for addressing the challenges associated with large-scale Li-ion battery applications. Specifically, silicon oxide (SiOx) has emerged as a promising alternative to graphite anodes, despite issues related to volume expansion and rapid capacity degradation. In this study, we synthesized carbon-coated SiOxusing diatom biomass derived from artificially cultured diatoms. However, the inherent carbon content from diatoms poses a significant challenge for the electrochemical performance of diatom-based anodes in large-scale applications. Subsequently, we conducted further research and demonstrated excellent performance with a carbon content of 33 wt.% as anodes. Additionally, real-time characterization of the carbonization process was achieved using thermogravimetry coupled with infrared spectroscopy and gas chromatography mass spectrometry (TG-FTIR-GCMS), revealing the emission of CO and C3O2during carbonization. Furthermore, electrochemical tests of the processed diatom and carbon (PD@C) anode exhibited outstanding rate capability (~500 mAh g−1at 2 A g−1), high initial Coulomb efficiency (76.95%), and a DLi+diffusion rate of 1.03 × 10−12cm2s−1. Moreover, structural characterization techniques such as HRTEM-SAED were employed, along with DFT calculations, to demonstrate that the lithium storage process involves not only reversible transport in Li2Si2O5and Li22Si5, but also physical adsorption between the PD and C layers. Exploring the integration of diatom frustules with the intrinsic carbon content in the fabrication of battery anodes may contribute to a deeper understanding of the mechanisms behind their successful application.
研究领域:
材料科学
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电化学
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生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zhenyu Xiao,Licai Fu,Jiajun Zhu,Wulin Yang,Deyi Li,Lingping Zhou
H2O, with its mild etching ability, was frequently used to regulate the morphology and crystal structure of substances, thereby enhancing their properties. Inspired by this, we utilized the crystal H2O in FeF3·3H2O to perform an etching process with an aim to improve the conductivity of FeF3, which could enhance its capacity level and rate capabilities. Herein, this research reported that this in-situ etching was conducted during the dehydration of FeF3·3H2O; meanwhile, the surface of the FeF3 grains was roughened, and traces of iron oxyfluoride were produced on it. The conductivity of the FeF3 grains was significantly enhanced, attributed to the semiconducting property of iron oxyfluoride. Moreover, the rough surface increased the effective contact area between the grains and the electrolyte, thereby increasing the exchange flux of Li+. With the increased quantity of iron oxyfluoride compounds, the charge transfer resistance of the electrode was reduced from 61.87 to 37.2 Ω, and the initial discharge capacity increased from 83.5 to 108.1 mAh g–1 at 2C. This finding provided strategies and methods for the surface modification of compound materials. Especially for halogen metal compounds with high theoretical capacity energy density, their chemical performance can be improved by in-situ defect engineering in the process of dehydration of their hydrates.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2020
·Vol. 8
·期 5
·2000008
·
IF 3.404
Chengrui Wang,Lei Zhang,Yuhai Dou,Luke Hencz,Lixue Jiang,Mohammad Al-Mamun,Porun Liu,Shanqing Zhang,Dan Wang,Huijun Zhao
Further commercial application of low-cost NiO-based anodes is hindered by their large volume expansion after full lithiation and relatively poor theoretical capacity. To improve these issues, transition metal (Fe, Co, or Mn)-modified triple-shelled NiO microspheres (TS-NiO) are successfully synthesized by using a hard template double-adsorption method. Among them, the Fe-modified TS-NiO (TS-NFO) exhibits an extraordinary lithium storage ability with high reversible capacity and outstanding cycling stability (2061.1 mAh g −1 after 800 cycles at 0.5 A g −1 ), which is the highest performing nickel oxide-based anode reported to date. The outstanding electrochemical performance of TS-NFO can be ascribed to its unique triple-shelled structure. The inner core of TS-NFO is composed of NiO and is encapsulated by two outer shells which are composed of a mixture of α-Fe 2 O 3 and NiFe 2 O 4 , resulting in a unique hollow triple-shelled structure (NiO@α-Fe 2 O 3 /NiFe 2 O 4 ). The void space between the triple shells leaves room for their volume changes during lithiation/delithiation, which improves the cycling stability. In addition, the introduced α-Fe 2 O 3 /NiFe 2 O 4 outer shells increase the energy density and reversible capacity due to a synergistically interactive effect.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 85
·81809-81813
·
IF 3.289
Menghu Wang,Hang Ping,Hao Xie,Baoli Chen,Min Yan,Weijian Fang,Zhengyi Fu
A genetically modified bacterial surface not only serves as a confined environment for controlling the monodispersity of particle size, but also provides a carbon source in situ. The carbon coated SnO2 composite exhibits good lithium storage properties as an anode electrode, which are due to the ultrasmall size of the particles, the carbon coating and mesoporous structure.
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
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 32
·12303-12314
·
IF 4.052
Haoqing Tang,Tao Liu,Zhiyuan Tang
ZnO materials with multidimensional stereoscopic morphologies were synthesized via a one-step solvothermal process with water, ethanol and acetone as solvents. In this work, well-prepared ZnO was used as a Zn source for preparing pristine Li2ZnTi3O8 anode materials for the first time by a facile solid-state method. The resulting Li2ZnTi3O8 electrode material with rice-shaped ZnO as the zinc source (LZTO-E) possessed a smaller particle size and larger specific surface area, which were conducive to increase the electrochemical reaction area. Impressively, the LZTO-E electrode showed an excellent electrochemical performance with large discharge capacity (253.4 mA h g−1 at 100 mA g−1) and good cycling stability (175 mA h g−1, 133.4 mA h g−1, and 115.0 mA h g−1 at 1000 mA g−1, 2000 mA g−1, and 5000 mA g−1 after 500 cycles, respectively). This superior electrochemical performance of the as-synthesized Li2ZnTi3O8 was attributed to the specific microtopography of ZnO.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 39
·期 10
·2801-2807
·
IF 6
Mengdi Zhang,Xiaofeng Lei,Yang Lv,Xizheng Liu,Yi Ding
Main observation and conclusion The application of lithium-ion batteries in cold climates has been hindered due to the decline in performance at low temperatures. The increased de-solvation energy and formation of Li dendrites at the anode surface emerge as the major challenges, which rely on the development of stable anode and compatible electrolytes. Herein, a self-healing GaInSn liquid metal (LM) based electrode coupled with a multi-solvent electrolyte is proposed toward reversible Li-storage at low temperatures. By using methyl butyrate (MB) as a co-solvent in 1 mol·L –1 LiTFSI of ethylene carbonate and diethyl carbonate, the electrolyte viscosity decreases from 52.07 to 13.75 mPa·s, while the ionic conductivity increases from 1.38 to 3.44 mS·cm –1 at –20 °C. Moreover, the Li/MXene@LM cells can display a discharge capacity of 500 mAh·g –1 , with capacity retention of 78% at –20 °C after 120 cycles. It is disclosed that a uniform LiF-rich solid electrolyte interface (SEI) layer on the anode is formed upon the addition of MB, which promotes the desolvation of Li ions at the interface of electrode/electrolyte especially at low temperatures. These results prove that MB as the co-solvent is well compatible with LM based anodes and holds great potential for the exploration of low-temperature energy devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6929
·
IF 3.748
Shenghao Li,Xiaohuan Wang,Zhiming Shi,Jun Wang,Guojun Ji,Xinba Yaer
Ferrous titanate (FeTiO3) has a high theoretical capacity and physical and chemical properties stability, so it is a potential lithium anode material. In this study, FeTiO3nanopowder and nanosheets were prepared by the sol–gel method and the hydrothermal method. In addition, niobium-ion doping was carried out, the radius of Nb close to Ti so the Nb can easily enter into the FeTiO3lattice. Nb can provide more free electrons to improve the electrochemical performance. Then, the effects of the morphology and niobium doping on the microstructure and electrochemical properties of FeTiO3were systematically studied. The results show that FeTiO3nanosheets have a better lithium storage performance than nanopowders because of its high specific surface area. A certain amount of niobium doping can improve the electrochemical performance of FeTiO3. Finally, a 1 mol% niobium-doping FeTiO3nanosheets (1Nb-FTO-S) electrode provided a higher specific capacity of 782.1 mAh g−1at 50 mA g−1. After 200 cycles, the specific capacity of the 1Nb-FTO-S electrode remained at 509.6 mAh g−1. It is revealed that an increased specific surface area and ion doping are effective means to change the performance of lithium, and the proposed method looks promising for the design of other inorganic oxide electrode materials.Keywords:FeTiO3;niobium doping;microstructure;lithium storage performance
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qingtian Li,Tao Wang,Baiyu Guo,Xin Qiao,Xing Meng,Di Jin,Hailong Qiu
As a conversion-type cathode material, FeS 2 emerges as a promising candidate for the next generation of energy storage solutions, attributed to its cost-effectiveness, environment-friendliness and high theoretical capacity. However, several challenges hinder its practical application, including sluggish kinetics, insulating reaction products and significant volume fluctuation during cycling, which collectively compromise its rate capability and cycle stability. Herein, a well-designed sandwich structure of FeS 2 embedded between graphite layers (FeS 2 /C) is obtained using a chloride intercalation and sulfidation strategy. The layered graphite-FeS 2 -graphite configuration boosts the active sites and adsorption capacity of Li + , thereby guaranteeing a high reversible capacity. Furthermore, the graphitic carbon matrix serves a dual purpose: it enhances electronic conductivity and restrain the volume fluctuation of FeS 2 during long cycling. This combination ensures robust electrochemical kinetics, structural integrity and long life. Consequently, the FeS 2 /C composites exhibit exceptional lithium storage performance, achieving capacities of 506.2 mAh g −1 at 0.5 A/g and 277.2 mAh g −1 at 5.0 A/g. Additionally, the FeS 2 /C composites show promising potential as cathodes for all solid-state lithium batteries, showcasing high specific capacities of 658.0 mAh g −1 at 0.1 A/g for the second cycle and maintaining a cycle performance of 288.5 mAh g −1 after 800 cycles at 0.5 A/g. These values surpass the second discharge specific capacity of 96.1 mAh g −1 and cycle capacity of 25.3 mAh g −1 observed for Fe 2 O 3 /C composites. The discharge mechanism of FeS 2 /C composites was further characterized through in-situ transmission electron microscope test. This work provides valuable insights for designing and synthesizing FeS 2 , highlighting its potential for lithium ion storage and all solid-state lithium batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Huichuan Tang,Zhi Li,Aojie Li,Shuntao Wen,Minghong Liu,Liang Chen,Yucan Zhu,Gangyong Li,Zhaohui Hou,Wei Wang
In this work, we successfully fabricated a carbon fiber-based composite material with a unique vine-like structure using a straightforward electrospinning method that employed dual-carbon-source and a self-catalysis approach. Graphene oxide was incorporated into the spinning matrix, and nickel was used as a catalyst during high-temperature calcination, facilitating the growth of secondary carbon fibers on primary carbon fibers and forming the vine-like structure. This novel hierarchical structure improved the interfacial bonding between carbon fibers, resulting in enhanced conductivity, improved interaction with the electrolyte, reduced lithium-ion diffusion distance, and superior lithium storage performance. The optimized composite material demonstrated excellent lithium storage capabilities, maintaining a specific capacity of 488.5 mAh/g after 400 cycles at a current density of 1 A/g. This work provides a valuable reference for the design of transition metal sulfides with improved lithium storage performance.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Fangbao Fu,Zhou Huang,Shuoyang Qiu
The low-cost and high-capacity SiOx is widely recognized as an ideal anode material for lithium storage; however, the challenges of low conductivity and significant volume expansion still need to be addressed. In this work, we incorporated SiOx into a lignin-derived carbon material with an elevated nitrogen content through a step-by-step carbonization strategy. Initially, the electrostatic assembly facilitated the formation of a complex comprising modified lignin and SiO2, which was subsequently subjected to carbonization and etching steps. Finally, due to zinc species inhibiting nitrogen decomposition, the cocarbonization of the lignin porous carbon/SiOx complex, zinc oxalate, and melamine enabled the construction of a nitrogen-enriched carbon/SiOx composite. The resulting carbon/SiOx composite exhibited a moderate specific surface area, abundant mesoporous channels, and an exceptionally high nitrogen doping content of 17.91 at. %. These characteristics effectively enhanced the storage and transportation of lithium ions while mitigating the volume expansion. As anodes in half batteries, the reversible specific capacity of the optimized carbon/SiOx reached 894 mAh/g during stable cycles, which was attributed to the enhanced ion diffusion rate and storage kinetics resulting from the high nitrogen content as well as the improved structural stability due to the encapsulated structure. Furthermore, the assembled lithium-ion capacitor demonstrated an energy density of 82 Wh/kg and maintained a capacity retention rate of 93.1% after undergoing 15,000 cycles. This work presents a novel concept for the synthesis of nitrogen-rich carbon matrixes but also offers insights into the structural optimization of silicon-based negative electrodes using green biomass.
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
ENERGY & FUELS
·
2021
·
IF 3.605
Liang Wu,Tao Ma,Yi Li,Yuan Yang,Hui-Hui Li,Shu-Hong Yu
Two-dimensional (2D) IV–VI nanomaterials have been important candidates for energy conversion and storage. However, there is still lack of a simple method of realizing control synthesis of IV–VI nanosheets. In this work, single-crystalline tin diselenide (SnSe2) nanosheets with a thickness of ca. 9 nm and a micrometer lateral size have been successfully synthesized through a hot-injection colloidal method. An evolution process study indicates that SnSe2 nanosheets are synthesized through coalescence of SnSe2 nanoparticles in an orientation attachment mechanism. The obtained SnSe2 nanosheet anodes delivered a high reversible capacity of 512 mA h g–1 with a coulombic efficiency of 98% at the current density of 0.1 A g–1, attributed to their special layered nanoarchitectures, which facilitates lithium ion (Li+) interfacial diffusion and storage. This work provides a meaningful approach to synthesizing single-crystalline 2D nanomaterials for energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Ye Fan,Chao Deng,Yuxuan Gao,Yi Ding,Yuchen Wu,Shiman Mo,Yingbang Yao,Bo Liang,Shengguo Lu,Wen Qi,Tao Tao
Using Li-carbon composites as anodes in high-energy-density lithium batteries leads to significant improvements in cycling life and safety compared with lithium metal. Li 2 C 2 consisting of dumbbell anions is the most thermodynamically stable phase in the family of lithium-carbon materials, however its low conductivity is a critical obstacle to the practical applications. sp 2 -hybridizing carbon is one promising option for unique electronic structures. Here, Li 2 C 2 alloy nanosheets composed of sp 2 -hybridized carbon atoms are directly formed from Li element and carbon during ball milling process, presenting a metallic feature at ambient conditions. After removing lithium from these alloy nanosheets, amorphous carbon ultrathin nanosheets are obtained. A vertically aligned Li 2 C 2 nanosheet foil prepared by pressing the milled powder, can be used as free-standing, binder-free electrodes for fabricating various types of lithium batteries, and their excellent electrochemical performance is attributed to a highly reversible Li atoms uptake in amorphous carbon nanosheets.
研究领域:
材料科学
·
电化学
✓ 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）