JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 5
·1165-1175
·
IF 2.5
Liu Shuling,Zhang Wei,An Yiming,Li Ying,Wang Jie,Wang Chao
The Si-based flexible electrodes attracted increasing research interests owing to the growing demand for high-performance flexible energy storage devices. Herein, a facile and smart self-assembly strategy is adopted to address huge volume expansion and particle aggregation issues of Si-based anodes, and a high-performance freestanding film anode (NC@Si/CNTs/N-rGO) is synthesized. The 3D-crosslinked porous graphene-CNTs networks offer abundant electric conductive pathways, high active sites, large internal space to accommodate the expansion of Si NPs, and facilitate Li + diffusion and insertion/extraction kinetics. The synergistic effect between the well-dispersed Si/NC nanoparticles and 3D porous networks significantly enhances electrochemical performance of Si NPs. The as-prepared NC@Si/CNTs/N-rGO electrode exhibits a high reversible specific capacity of 1089 mAh·g −1 at a charge–discharge current density of 1 A·g −1 after 500 cycles. Even at 2 A·g −1 , the electrode still exhibits an excellent reversible specific capacity of 606 mAh·g −1 after 300 cycles. These indicate that the NC@Si/CNTs/N-rGO is a promising candidate for high-performance flexible anode material in lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
先进电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Mengyi Wang,Li Yin,Mingqi Li,Shaohua Luo,Chao Wang
To develop low-cost, high-capacity and long-life anode materials for lithium-ion batteries, glucose-C and F-doped C coated SiO composites with adjustable pore structure (p-SiO@gl-C@F-doped C) are synthesized by facile and scalable methods. The combination of the heterogeneous dual-carbon shells and porous structure significantly promotes the reaction kinetics of the electrode, effectively suppresses and buffers the volume expansion of SiO, and largely enhances the stability of solid electrolyte interface of the electrode. In a half cell, the optimized p-SiO@gl-C@F-doped C (7:3) composite shows a stable discharge capacity of 785 mAh g −1 at a current density of 200 mA g −1 . The discharge capacity is maintained at 772 mAh g −1 after 200 cycles. At a current density of 400 mA g −1 , the electrode shows a discharge capacity of 633 mAh g −1 after 500 cycles, with a capacity degradation of ∼0.0096% per cycle from the 2nd cycle to the 500th cycle. The full cell which is composed of the commercial LiFePO 4 as a cathode and the optimized composite as an anode, exhibits high capacity and good cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Bin Xiao,Wen-hai Zhang,Peng-bo Wang,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Jun-chao Zheng,Bo Wang
Phosphate-based polyanion-structured materials have attracted considerable attention as anode materials in lithium-/sodium-ion batteries due to their stable crystal structure, affordability, and environmental friendliness. V 2 (PO 4 )O was encapsulated into crumpled nitrogen-doped graphene (VPO@N-G) through a facile spray-drying method in which VPO particles were completely encapsulated by N-doped graphene. For the first time, VPO@N-G was explored as an anode material for sodium-ion batteries. The Na + storage behavior of VPO@N-G was systematically investigated at the voltage range of 0.01–3.0 V (versus Na/Na + ). Results indicated that the VPO@N-G anode can deliver a highly reversible discharge capacity of 539 mAh g −1 at 0.05 A g −1 and achieve a highly reversible discharge capacity of 235.9 mAh g −1 even at a high current density of 10 A g −1 . Thus, VPO@N-G can be applied as a high-rate anode material for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米复合材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
JOM
·
2019
·Vol. 72
·期 6
·2245-2249
·
IF 2.305
Zhang Yannan,Zhang Yingjie,Li Xue,Liu Jiaming,Zhang Mingyu,Yang Xi,Huang Mengyang,Xu Mingli,Dong Peng,Zhou Zhongren
The molten salt electrolytic method was introduced to prepare metallic silicon that simply utilizes SiO 2 powder as the raw material and equimolar CaCl 2 -NaCl as the electrolyte under 1.8 V current at 700°C for 5 h.
The electrochemically synthesized silicon was in the form of nanowire structures with average sizes of 90 nm in diameter and over 1 μm in length. The current efficiency and specific energy consumption of producing silicon nanowires were calculated to be 79.2% and 8.703 kWh/kg, respectively. Benefiting from the synthesized nanowire structure, the silicon anode exhibited a high initial discharge-specific capacity of 3348.1 mAh/g with an initial coulombic efficiency of 85.2%.
The present research provides a straightforward idea to show the feasibility of synthesizing silicon-based material by the molten salt electrolytic method and to introduce the application of synthesized silicon nanowires to lithium-ion battery systems.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 6
·3111-3119
·
IF 2.4
Teng Zeyu,Wang Zhilong,Li Zhongcheng,Chen Kanghua
Silicon is a strong competitor for the anode of the next generation of lithium-ion batteries, and ball-milled silicon has broad prospects as a low-cost method for preparing nano silicon. In order to match ball-milled silicon, it is imperative to develop better bonding agents with lower costs. Through adding amino silane coupling agent, the performance of ball-milling silicon anode is enhanced. This study explored the network structure formed by amino silane coupling agent with different chain lengths and polyacrylic acids. Herein, the crosslinked network prepared with 3-[2-(2-aminoethyl amino) ethyl amino] propyl-trimethoxysilane as coupling agent had the best performance, and the initial discharge capacity of the silicon anode prepared by this binder reached 3297.4 mAh·g −1 at a constant current density of 0.5A·g −1 , the initial Coulomb efficiency reached 92.25%. After 100 cycles, the discharge capacity of anode was still maintained at 2229.5 mAh·g −1 with excellent charge/discharge performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
高分子化学
·
表面改性
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15016-15023
·
IF 3.925
Yayue He,Youjia Zhang,Zhenxi Li,Peng-Fei Cao,Huabin Yang,Shilun Gao
As a promising anode material for next-generation high-energy density lithium-ion batteries (LIBs), one of the main technical issues for silicon (Si) electrodes is the low initial Coulombic efficiency (ICE). By a pre-lithiation process, preparation of lithium–silicon (Li–Si) alloy electrodes can efficiently improve the ICE, thus leading to excellent electrochemical performance. Herein, with solid wastes as precursors, we report a cost-efficient approach for the fabrication of Li3.25Si anode materials via simple magnesiothermic reduction and then mechanical alloy reaction methods, combining the advantages of low-cost and high ICE. The prepared Li3.25Si@acetylene black (Li3.25Si@A) electrode exhibits excellent electrochemical performance with a high reversible capacity of 1138.9 mA h g−1 over 90 cycles at a current density of 100 mA g−1 and its ICE is as high as 107.7%, which is superior to that of the commercial Li3.25Si@A electrode. With a simple and low-cost manufacturing process and high ICE, the fabrication process will be definitely meaningful in achieving low-cost and high-capacity anode materials with a prolonged cycle life.
研究领域:
材料科学
·
电化学
·
能源存储
·
可持续材料
·
电池技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Haoxiang Yu,Hua Lan,Lei Yan,Shangshu Qian,Xing Cheng,Haojie Zhu,Nengbing Long,Miao Shui,Jie Shu
Hollow microstructure always exhibits some special properties in the field of electrochemistry . Here, this study reports the rational design and preparation of TiNb 2 O 7 nanofibers with one dimensional hollow structure via co-electrospinning. The as-electrospun TiNb 2 O 7 hollow nanofibers show high intercalation potential, low charge-charge resistance and fast electrochemical kinetics . The electrochemical results exhibit that the TiNb 2 O 7 hollow nanofibers deliver a reversible capacity of 210.1 mAh g −1 after 150 cycles at a current rate of 0.4 C, and 158.4 mAh g −1 after 900 cycles even at a current rate of 10 C with an outstanding capacity retention of 80.6%. The excellent electrochemical performance of nanofibers can be related to the unique morphology of hollow structure. Furthermore, the lithium ions storage mechanism of TiNb 2 O 7 hollow nanofibers is also systematically analyzed, which is related to one two-phase coexistence and two solid-solution processes during the whole charge-discharge cycle. In addition, it is also demonstrated by in situ and ex situ observations that TiNb 2 O 7 hollow nanofibers have outstanding structural stability and electrochemical reversibility. Therefore, the TiNb 2 O 7 hollow nanofibers can be applied as an alternative promising electrode material for the next rechargeable lithium ions batteries .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yihui Li,Kun Chang,Hongwei Tang,Bao Li,Yalei Qin,Yan Hou,Zhaorong Chang
To address the large structural and volume changes of commercial WO 3 during charge/discharge, which make this material unsuitable for use in Li-ion batteries (LIBs), we herein prepared oxygen deficient WO 3- x nanosheets on a large scale by thermal treatment of ammonium paratungstate in a reducing atmosphere followed by sonication and freeze-drying. The above nanosheets were employed as LIB anode materials and exhibited a specific capacity and cycling stability significantly exceeding those of oxygen-deficient WO 3- x nanoparticles and commercial WO 3 . In addition, we investigated the effect of nanosheet loading on electrode performance, demonstrating that the best results (Li storage capacity of ∼628 mAh g −1 after 100 cycles at 100 mA g −1 ) were obtained at a nanosheet content of 20 wt%. This excellent performance was ascribe to the good exposure of defects caused by the comparatively small size of WO 3- x nanosheets , which resulted in an increased number of sites and diffusion paths available for Li-ion storage and transfer. The novel electrode-optimized strategy may be extended to the fabrication of other electrodes that use nanomaterials as active substances due to its superior comprehensive performance and low cost.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Fengchen Zhou,Xu-Sheng Yang,Jiangwen Liu,Jun Liu,Renzong Hu,Liuzhang Ouyang,Min Zhu
Owing to the high theoretic capacity (2596 mAh g −1 ) and suitable lithiation potential (～0.7 V vs. Li + /Li), Black phosphorus (BP) is considered as an ideal anode material for the fast-charging lithium-ion batteries. However, BP still faces the large volume change and low Li + transfer during the charge/discharge. In this work, a facile two-step high-energy ball milling method is developed to synthesis the black phosphorus@TiP 2 –C (CBP@TiP 2 –C) nanocomposite for the high-rate performance anode material, in which the conductive nanocrystalline TiP 2 is in-situ introduced and uniformly distributed into BP-C matrix. We reveal that the uniformly dispersed TiP 2 nanocrystals can enhance the electronic and ionic conductivities of active particles and the electrode reaction kinetics. The lithiation product cubic Li y TiP 4 phase is beneficial to release the stress, reduce the Li + diffusion energy barrier and accelerate the Li + extraction from LiP 3 upon delithiation . Moreover, the contact among different components can be improved by Ti–C and P–C bonds in the CBP@TiP 2 –C, thus ensuring excellent electric contact within the material and enhancing the structural stability of composites. As a result, the CBP@TiP 2 –C anode displays a high reversible capacity of 1007.4 mAh g −1 at 10.0 A g −1 and excellent capacity retention of 925.6 mAh g −1 after 500 cycles at 2 A g −1 .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态化学
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·4943-4947
·
IF 2.961
Li Ze,Li Yonghua,Xie Huan,Zuo Zhaoyang,Chu Peng
As a kind of anode materials, iron matrix oxide cannot be widely used in the lithium-ion batteries due to their poor electrical conductivity and huge volume change during the electrochemical cycles. Herein, the porous carbon@Fe 2 O 3 composites are prepared by hydrothermal method. Due to the porous structure and introduction of carbon, the electrical conductivity can be greatly improved. Additionally, the porous structure could buffer the volume change during electrochemical cycles. As a result, the as-prepared carbon@Fe 2 O 3 composites deliver a high initial specific capacity of 1168 mAh/g at 0.1 C. Moreover, the carbon@Fe 2 O 3 composites show outstanding rate performance and superior cycling stability. This work provides a potential anode material for high electrochemical performance Li-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2009
·
IF 1.51
Rongguan Lv,Jun Yang,Pengfei Gao,Yanna NuLi,Jiulin Wang
A mixture of nanoporous and nanofibrous silicon (NPNF-Si) is prepared by the mechanochemical reduction of SiCl 4 using Li 13 Si 4 as reducing agent in the presence of Super P carbon (SP) and the following thermal treatment and washing process. Morphologies and structures of the as-obtained composites are investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). After carbon coating via pyrolysis of polyvinyl chloride (PVC), the resulting NPNF-Si/SP/C composite is evaluated for the use as anode material in lithium-ion battery. It exhibits the first discharge capacity of 746.6 mAh g −1 at current density of 0.2 mA mg −1 and capacity retention of 91.1% after 30 cycles. The good electrochemical performance arises from the particular Si nano-structure, which can alleviate the volume effect during lithium insertion and extraction.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2019
·Vol. 29
·期 3
·310-315
·
IF 3.31
Chao Hou,Ke Yang,Fawei Tang,Haibin Wang,Xuemei Liu,Xiaoyan Song
A micro-nano combined composite with Li-Si alloy nano-domains in three-dimensional carbon network was prepared as a novel electrode material. The carbon network constrained the volume contraction and promoted effectively charge transfer of the whole active material. Meanwhile, the abundant interfaces between Li-Si alloy and carbon bound by Li-C ionic bonds, not only enhanced the delithiation at interface but also ensured the structural integrity. The present composite exhibited excellent electrochemical performance. The specific capacity at the first lithiation was as high as 1133 mAh g −1 at a current density of 0.1 A g −1 , which is superior to those reported for the core-shell structured nanoparticles. The Coulombic Efficiency at the first cycle was 90.4% and kept stable at more than 99.0% after only 10 cycles. The capacity retention was nearly twice as that of the incompact mixture of Li-Si nanoparticles and carbon. The energy density of the full cell constructed by the present composite and sulfur was evaluated to be 3 times as high as that of the commercial lithium-ion batteries. This work provides a new universal strategy for developing Li-rich anode materials with high combination properties and low cost.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）