DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 31
·11909-11915
·
IF 4.569
Siyu Chen,Yanan Xu,Hongbin Du
SiOx is one of the most promising anode materials for lithium-ion batteries (LIBs), due to its high theoretical capacity and low cost. However, the huge volume expansion and low electron/ion diffusion rate hinder its further commercial applications. Herein, a simple molecular polymerization method is developed to synthesize N,P co-doped SiOx–C composites (denoted as SiOx–C@CNT), in which SiOx and carbon are uniformly dispersed at the atomic level, and the embedded carbon nanotubes improve the lithium ion diffusion kinetics. Benefiting from the unique structure, the SiOx–C@CNT composites exhibit a high reversible capacity of 848 mA h g−1 at 0.1 A g−1 and long cycling stability (84.0% capacity retention after 1500 cycles). More impressively, the LiCoO2∥SiOx–C@CNT full battery also exhibits stable cycle life (only 4.7% capacity loss after 300 cycles at 1 C). These results show the application potential of the SiOx–C@CNT anode in LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Huaide Chen,Guojun Xu,Chenxin Jin,Jize Wu,Linwu Xiong,Xiaomin Li,Fugen Sun,Lang Zhou,Zhihao Yue
Silicon monoxide (SiO x , 0 < x < 2) has been limited in commercial applications due to its low electrical conductivity and large volume expansion effect. The existing method is to use liquid phase method for carbon coating treatment, but some problems such as uneven coating are still exist. Therefore, in this paper, C 2 H 2 is used as carbon source to coat SiO x material in a rotating chemical vapor deposition furnace to obtain hard carbon coated SiO x (SiO x @C) material. At the rate of 0.5C (1C = 2.1 A g −1 ), the discharge specific capacity of SiO x @C remained at 1116.8 mAh g −1 after 140 cycles, which is 539.8 mAh g −1 higher than SiO x .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Haoqiang Wang,Xiaoqi Que,Yani Liu,Xingxing Wu,Qunhui Yuan,Jingyu Lu,Wei Gan
Silicon oxide (SiO x ) is an attractive anode material for lithium-ion battery due to its high specific capacity and low working potential. However, its scale utilization confronts with low electrical conductivity and large volume expansion. Herein, a yolk-shell structured N, S co-doped SiO x /C@void@C nanosphere is fabricated through a one-pot organosilica template mediated strategy. The co-doping of N, S enables SiO x /C@void@C with good conductivity, increased lithium storage capacity and improved interfacial contact. The hollow void between SiO x /C core and carbon shell effectively buffers the large volume change during the cycling. Consequently, the yolk-shell SiO x /C@void@C structures exhibit excellent electrochemical performance, with a high discharge specific capacity of 879 mAh·g −1 after 100 cycles at 0.1 A·g −1 , outstanding rate capability of 464 mAh·g −1 at 5 A·g −1 and excellent cycling stability of 584 mAh·g −1 after 500 cycles at 1.0 A·g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 21
·2101145
·
IF 18.808
Xiaoming Zhou,Yang Liu,Yang Ren,Tiansheng Mu,Xucai Yin,Chunyu Du,Hua Huo,Xinqun Cheng,Pengjian Zuo,Geping Yin
SiO x /C composites with a void-reserving structure are promising anodes for lithium-ion batteries. However, the facile and controllable synthesis of uniformly dispersed SiO x and carbon components, simultaneously incorporating ample voids, still remains a great challenge. Herein, a molecular polymerization strategy is devised to construct SiO x /C hollow particles for lithium-ion batteries. 3-aminopropyltriethoxysilane and dialdehyde molecules are judiciously engineered as silicon and carbon precursors to produce the polymer hollow spheres (PHSs) through a one-step aldimine condensation without any template and additive. A range of PHSs is obtained using terephthalaldehyde, glutaraldehyde, and glyoxal as the crosslinkers, demonstrating the high tunability of the strategy. Importantly, in situ pyrolysis of the PHSs warrants the homogeneous incorporation of SiO x ( < 5 nm) in carbon hollow capsids at a nanocluster scale. The obtained SiO x /C hollow spheres exhibit excellent Li + -ion storage behaviors, including cycling lifespan, coulombic efficiency, and rate performance. The superior performance is attributed to the well-dispersed SiO x nanoclusters in carbon substrate and the hollow structure. This molecular polymerization approach not only enables Si-based hollow composites effective and scalable anode materials but also opens up a new avenue for the controllable synthesis of template-free hollow architectures.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ran Wang,Jing Wang,Shi Chen,Chenglong Jiang,Wurigumula Bao,Yuefeng Su,Guoqiang Tan,Feng Wu
Low conductivity and structural degradation of silicon-based anodes lead to severe capacity fading, which fundamentally hinders their practical application in Li-ion batteries. Here, we report a scalable Si/SiOx@C anode architecture, which is constructed simultaneously by sintering a mixture of SiO/sucrose in argon atmosphere, followed by acid etching. The obtained structure features highly uniform Si nanocrystals embedded in silica matrices with well-controlled internal nanovoids, with all of them embraced by carbon shells. Because of the improvement of the volumetric efficiency for accommodating Si active spices and electrical properties, this hierarchical anode design enables the promising electrochemical performance, including a high initial reversible capacity (1210 mAh g–1), stable cycling performance (90% capacity retention after 100 cycles), and good rate capability (850 mAh g–1 at 2.0 A g–1 rate). More notably, the compact heterostructures derived from micro-SiO allow high active mass loading for practical applications and the facile and scalable fabrication strategy makes this electrode material potentially viable for commercialization in Li-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Zhuoya Ren,Shuai Liu,Jianqiang Chen,Yang Yu,Qianqian Shang,Sandile Fakudze,Chengguo Liu,Peiguo Zhou,Qiulu Chu
As the world transitions towards an electric vehicle-driven future, demand for energy storage materials has continued to grow. Silicon-carbon composites are considered one of the most promising anode materials for lithium-ion batteries owing to their superior electrochemical performance. However, their commercialization is seriously limited due to the use of chemical reagents as carbon source, unstable coating structures and the complexity of the synthesis process. Herein, a facile one-step carbonization method at 800 °C was used to prepare Si@SiO X @C-800 composite by using rice husks, 1‑butyl‑3-methylimidazolium acetate (BMIMAcO) and silicon nanoparticles (Si-NPs). When the optimized Si@SiOx@C-800 was applied to the anode of lithium-ion batteries, it exhibited prominent reversible capacity (694 mAh g −1 at 0.1 A g −1 ), with remarkable rate performance (220 mAh g −1 at 2 A g −1 ), and excellent cyclic stability (460 mAh g −1 with a capacity retention of 105.7% at 1 A g −1 after 1000 cycles). The coupling of interfaces by Si-N bonds led to the formation of a double-layered structure which enhanced Li + diffusion coefficients and electrochemical kinetics, while tremendously limiting the volume variation of Si nanoparticles (Si NPs). The double-shell-structured Si@SiO X @C-800 composite material which was facilely synthesized using an eco-friendly approach presented superior electrochemical performance.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
可持续材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiawei Ge,Quntao Tang,Honglie Shen,Fei Zhou,Haobing Zhou,Wangyang Yang,Juan Hong,Binbin Xu,Jaffer Saddique
Silicon suboxide (SiO X ) is a promising anode material for lithium ion battery (LIB). However, oxygen-dependent SiO X poses a great impact on its cycling stability, which is difficult to controllably prepare. Additionally, the aggregation of nano-scale SiO X restricts the diffusion of lithium ion and structural stability during cycles. Herein, we realize the controllable preparation of porous SiO X /C sheets with various oxygen content and graphite-like carbon as anode materials of LIB . It is found that high oxygen content and a 3-dimensional network in SiO X /C can ensure high structural stability during cycles. As-prepared SiO X facilitates the growth of graphite-like carbon with high defect density, improving their electron and ion conductivity. As-prepared SiO X @C sheets deliver superior reversible capacity, cycling stability and rate performance (the second discharging capacity of 717.4 mAh g −1 at 100 mA g −1 with high initial Coulombic Efficiency of 64.08% is obtained; its capacity retention is as high as 100.44% against the second discharging capacity after 200 cycles; at a high current density of 2000 mA g −1 , its reversible capacity still remains 389 mAh g −1 ). This work provides a novel and simple approach to controllably prepare disproportionated SiO X @C sheets with the 3-dimensional network as ultrastable SiO x -based anode materials of LIB for practical application.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Mengmeng Yang,Liwei Jin,Mingyi He,Zao Yi,Tao Duan,Weitang Yao
Low silicon oxide (SiO) is a promising anode material for lithium and potassium ion batteries due to its high theoretical capacity (~2400 mAh g −1 ) and good cycle performance. However, volume effects and poor intrinsic electronic conductivity during cycling limit its practical application. To meet this challenge, we synthesized SiO x @C (SC) anodes with various carbon contents by ball milling and high-temperature carbonization. The graphite/asphalt coating reduces the volume expansion of SiO and reduces the mechanical stress. When used as a lithium ion battery (LIB) electrode, the SC-2 material retained a lithium storage capacity of 729.5 mAh g −1 after 200 cycles at a current density of 200 mA g −1 . In addition, when used as a potassium ion battery (KIB) electrode, the SC-2 material provides a high capacity with a discharge capacity of 107.0 mAh g −1 after 400 cycles at 200 mAh g −1 and excellent cycle life (after 2000 cycles at 500 mA g −1 , the capacity 80.8 mAh g −1 was retained). The potassium storage mechanism of the SC electrode was analyzed by the simple ex-situ XRD technique. These results show that SC anodes are promising for application as anode materials for LIBs and KIBs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 11
·1398
·
IF 5.8
Jianing Zong,Kaize Si,Jingjing Li,Xiaomei Wang,Xu Zhang
SiOxanodes are highly promising for next-generation lithium-ion batteries due to their superior theoretical capacity. However, issues such as drastic volume expansion and low initial Coulombic efficiency (ICE) impede their practical use. While macroporous architectures can mitigate these challenges, traditional fabrication often depends on tedious hard templating methods and significant organic solvent consumption. In this work, we report a sustainable, emulsion-self-templated and organic solvent-free strategy to synthesize a carbon-coated 3D macroporous SiOx/C composite (3DM-SiOx/C@C). Our approach uniquely integrates radical polymerization with a water-in-oil emulsion and sol–gel process, followed by chemical vapor deposition (CVD). The 3D macroporous framework is generated via in-situ emulsion droplets acting as self-templates, effectively eliminating the need for external sacrificial templates and toxic etchants. Notably, this organic solvent-free process achieves an exceptional precursor to (precursor + organic solvent) mass ratio of 1.0, contrasting sharply with conventional methods (0.0044–0.17). The resulting hierarchical structure, characterized by interconnected macropores and a uniform carbon coating, significantly enhances structural integrity and electronic conductivity. Electrochemical evaluations reveal that 3DM-SiOx/C@C exhibits an improved ICE of 74.32% and long-term cycling stability even at a high current density of 1.0 A g−1compared to non-porous and uncoated counterparts. This integrated synthesis offers a green and scalable pathway for developing high-performance silicon-based anodes for large-scale energy storage.
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·649-660
·
IF 2.289
Yan Honglin,Ru Qiang,Gao Ping,Cheng Shikun,Ling Francis Chi-Chung
In the past few years, silane coupling agents are often used to modify the surface of silicon materials; however, researches in preparation of SiO X -based materials pyrolyzed from silane coupling agents are seldom reported. Hence, in order to prepare amorphous SiO X @C anodes for Li-ion storage, we adopted three kinds of silane coupling agents as organic silicon sources. The results show that silane coupling agents with vinyl group is the optimum organic silicon source. Owing to the strong chemical bonds of Si–O–C, amorphous SiO X particles are uniformly embedded in carbon matrix, forming monodisperse microbeads architecture with good buffer abilities. Therefore, the V-SiO X @C anodes derived from silane coupling agents with vinyl groups show good electrochemical performance, retaining a reversible discharge capacity of 940 mAh g −1 at a current density of 100 mA g −1 after 200 cycles, and it still depicts a good long-term cycling durability, maintaining 739 mAh g −1 at a current density of 400 mA g −1 after 400 cycles.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Zhiyuan Wang,Haohui Zhang,Xinyu Zhang,Xiaomei Wang,Xu Zhang
High-capacity SiO x anodes are fatally limited by poor electrical conductivity and huge volume fluctuations. Nano-engineering can effectively extend battery life, but achieving the transformation of nanostructures from laboratory synthesis to industrial mass production still remains a great challenge. Conventional synthetic routes are plagued by harsh conditions, complex processes, and especially low yields; even if they are adopted by industrial production, the large amounts of solvents in traditional wet chemical methods will pose a potential risk of pollution and energy waste. Herein, a solvent-free and mass-producible strategy is presented to prepare SiO x /C@C nanocomposite via solvent-free sol-gel, ball milling , and carbon coating process . The production exhibits favorable powder properties for conventional LIB fabrication technology, such as narrow particle size distribution , suitable specific surface area, as well as a high yield (40.5%). The prepared SiO x /C@C anode displays a high initial coulombic efficiency (71.4%) and reversible capacity (1279 mAh g −1 at 0.1 A g −1 ), and a great durability (80.08% capacity retention after 1000 cycles at 1.0 A g −1 ). Furthermore, the superior matching performance of SiO x /C@C//LiCoO 2 full-cell is also clearly demonstrated, especially the high energy density (347 Wh kg −1 ). This ingenious and scalable strategy will remarkably promote the commercialization of nanostructures.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
·
电池材料
·
功能材料
·
工业化学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 16
·e202300233
·
IF 2.1
Yang Ling,Yan Peng,Shiyou Guan
Graphical Herein, a series of SiO x /C composites with uniform carbon distribution were prepared by sol-gel method and subsequent pyrolysis process, the carbon content can be easily adjusted just by selecting different organosilanes. Particularly, when BTEB was used as the raw materials, due to the uniformly dispersed of carbon at nanoscale and the appropriate carbon content, the SiO x /C−B exhibited excellent electrochemical performance in LIBs. SiO x /C composites with uniform distribution of silicon oxide (SiO x ) and carbon are promising anodes for lithium-ion batteries. However, designing the SiO x /C composites with uniformly dispersed of carbon at nanoscale and controllable carbon content is still a challenge. Herein, a series of SiO x /C composites with uniform carbon distribution were prepared by sol-gel method and subsequent pyrolysis process, the carbon content can be easily adjusted just by selecting different organosilanes. Due to the uniformly dispersed of carbon at nanoscale, the obtained products showed the excellent energy storage performance. Particularly, when Bis(triethoxysilyl)benzene (BTEB) was used as the raw materials, due to the appropriate carbon content, the SiO x /C−B exhibited a high reversible capacity of 535 mAh g −1 at 0.1 A g −1 over 100 cycles. The cycle stability is preserved even after 300 cycles at a high current density of 1.0 A g −1 , where the electrodes still supply a specific capacity of 389.7 mAh g −1 .
研究领域:
材料科学
·
能源存储技术
✓ 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）