SOLID STATE IONICS
·
2021
·
IF 3.785
Jinlong Cui,Yang Qiu,Haibang Zhang,Zhendong Yao,Wenyuan Zhao,Yunying Liu,Juncai Sun
To enhance the comprehensive utilization of agricultural waste in new energy materials, sulfur/nitrogen dual-doped porous C/SiO x composites (SN@C/SiO x ) are successfully prepared via a facile and economical method. In this approach, rice husks are used as the C and Si source and thiourea as the S and N source. This SN@C/SiO x composite possesses a high specific surface area and SiO x particles are evenly distributed in the S/N-doped C matrix. The S/N-doped C matrix not only improves electrical conductivity and impedes the agglutination of particles, but also buffers the volume variation of SiO x , achieving enhanced electrochemical properties . As a lithium-ion battery (LIBs) anode, the as-synthesized SN@C/SiO x composite delivers an impressive specific capacity (1150 mAh/g) and enhanced initial coulombic efficiency (CE) of 70.4%. Even at a large current density of 1.0 A/g, the reversible capacity remains 632 mAh/g after 1200 cycles. This doping carbonization strategy offers the potential for using rice husks in the development of high-performance lithium ion batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Bingjie Ma,Jing Luo,Jiao Peng,Zhenyu Wu,Ting Xing,Hong Liu,Chun Wu,Zhigao Luo,Xianyou Wang
SiO x is proposed as one of the most promising high-performance anodes for its favorable capacity and stable lithium insertion/extraction electric potential, however its effective commercial application still faces giant challenge. To overcome poor electrical conductivity and huge volume effect of silicon oxide-based material, we adopt a valid strategy to synthesis the SiO x nanosphere double-wrapped by MoS 2 and multi-walled carbon nanotubes (CNTs) as anode material. The influences of MoS 2 and CNTs on the structure, morphology and electrochemical performances of nanohybrid are probed detailly by transmission electron microscopy , X-ray photoelectron spectroscopy and charge-discharge measurements. The results show that as-prepared nanohybrids release a steady reversible capacity of 798 mAh g −1 with high capacity retention of 81.4% at 500 mA g −1 after 300 cycles. The outstanding electrochemical properties can be ascribed to the facts that the hollow mesoporous structure affords ample buffer space and the introduction of MoS 2 with a two-dimensional layered structure can provide more exposed active-sites for lithium adsorption, as well as the CNTs wrapping can form a favorable conductivity matrix, endowing the nanocomposites with great structural stability. Accordingly, this new structure design by means of a heterogeneous dual-wrapped architecture develops a significant strategy for the development of high-performance SiO x -based anode materials.
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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yunfei Yao,Xiangyang Xu,Hongye Zhao,Yuanlin Tong,Yina Li
In the development of high-performance lithium-ion batteries (LIBs), the composition and structure of electrode materials are of critical importance. Silicon has a theoretical specific capacity 10 times that of graphite, nonetheless, its application as an anode material confronts challenge as it undergoes huge volume change and pulverization amidst the alloying and dealloying processes. Herein, a novel method to prepare a multilayer Si-based anode was proposed. Three layers, SiO 2 , nickel and triethylene glycol (TEG), were coated successively on Si nanoparticles , which served respectively as the sources of SiO x , sacrificial templates and carbon. Nickel can not only serve as a hollow template, but also play a catalytic role, which makes carbonization and redox reactions occur synchronously under a mild condition. Amid the carbonization process of TEG at 450 °C, several-nm-thick SiO 2 layer can react with the as-derived carbon to form a silicon suboxides (SiO x (0 < x < 2)) intermedium layer. After removing the nickel template, a micro-nano scaled Si@SiO x @void@C with conformal multilayer-structure can be obtained. The BET specific surface area and pore volume of powders were increased dramatically because of the derivation of abundant voids, which can not only buffer the swelling effect of silicon, but also provide richer ionic conductivity . The as-assembled half-cell with Si@SiOx@void@C as the anode material possesses high capacity (∼1000 mAh g −1 at 3 A g −1 ), long cycle life (300 cycles with 77% capacity retention) and good rate performance (558 mAh g −1 at 5 A g −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 6
·2305793
·
IF 13.3
Quan Ouyang,Guangshe Li,Xin Zhang,Xu Zhao,Shilong Fu,Liping Li
Gradient-structured materials hold great promise in the areas of batteries and electrocatalysis. Here, yolk–shell gradient-structured SiO x -based anode (YSG-SiO x /C@C) derived from periodic mesoporous organosilica spheres (PMOs) through a selective etching method is reported. Capitalizing on the poor hydrothermal stability of inorganic silica in organic–inorganic hybrid silica spheres, the inorganic silica component in the hybrid spheres is selectively etched to obtain yolk–shell-structured PMOs. Subsequently, the yolk–shell PMOs are coated with carbon to fabricate YSG-SiO x /C@C. YSG-SiO x /C@C is comprised of a core with uniform distribution of SiO x and carbon at the atomic scale, a middle void layer, and outer layers of SiO x and amorphous carbon. This unique gradient structure and composition from inside to outside not only enhances the electrical conductivity of the SiO x anode and reduces the side reactions, but also reserves void space for the expansion of SiO x , thereby effectively mitigating the stress caused by volumetric effect. As a result, YSG-SiO x /C@C exhibits exceptional cycling stability and rate capability. Specifically, YSG-SiO x /C@C maintains a specific capacity of 627 mAh g −1 after 400 cycles at 0.5 A g −1 , and remains stable even after 550 cycles at current density of 2 A g −1 , achieving a specific capacity of 519 mAh g −1 .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
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
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能源存储
·
可持续材料
✓ 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
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Yuju Zhu,Songyuan Sun,Guoqiang Qin,Yue Chen,Shimeng Zhang,Na Fu,Jingbo Chen,Menglan Lv
SiO x is a promising anode for lithium–ion batteries, but practical use is hindered by low conductivity, large volume changes, and unstable interfaces. Here, a mild strategy is reported to fabricate a SiO x @RF@CNTs composite anode with a hollow mesoporous architecture and dual–carbon modification. Mesoporous SiO 2 nanospheres are converted into hollow structures by hot–water treatment, which selectively etches the relatively loose interior through mesoporous channels and enables tuning of particle size and shell thickness without harsh acidic or alkaline etchants. The hollow SiO 2 is then coated with resorcinol–formaldehyde resin and combined with carbon nanotubes to build a conductive network. After thermal treatment in an inert atmosphere, SiO 2 is partially reduced to nonstoichiometric SiO x . XPS depth profiling reveals depth–dependent chemical–state variation during this conversion. Owing to synergistic structural buffering, improved interfacial stability, and enhanced charge transport, the electrode delivers 464.8 mAh g −1 after 500 cycles at 1 A g −1 , with good rate capability and favorable kinetics.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Mengyue Yu,Jian Ma,Lei Dong,Minghao Huang,Bangzhuang Xue,Yi Sun,Hongfa Xiang
Silicon monoxide (SiOx, x ≈ 1) has been a promising candidate of anode materials for next-generation lithium-ion batteries due to its high specific capacity (∼2600 mA h g–1). However, huge volume expansion and the resultant repeated destruction of the solid electrolyte interphase (SEI) are key challenges to the practical application of the SiOx anode. In this work, a highly elastic quasi-solid polymer electrolyte (QSPE) is demonstrated for batteries employing an SiOx anode, which is prepared via in situ cationic ring-opening polymerization employing 1,3,5-trioxane (TXE) as the monomer, 1,3,2-dioxathiolane 2,2-dioxide (DTD) as both the initiator and film-forming additive, and fluoroethylene carbonate as the plasticizer. This TXE-based QSPE possesses excellent ionic conductvity properties, including an extremely low glass-transition temperature of −94.3 °C, a high ionic conductivity of 1.36 mS cm–1 at 25 °C, and a high Li+ transference number of 0.66. The long poly-TXE skeleton endows the polymer electrolyte with a high elastic modulus of 42 MPa, helping to effectively suppress the volume expansion of the SiOx anode during cycling. DTD participates in the construction of a robust SEI containing Li2SOx species, mitigating the structural collapse of SiOx particles. As a result, the cyclic stability of the SiOx anode has been remarkably enhanced─the Li||SiOx half-battery with the in situ TXE-based QSPE achieves 81.9% capacity retention after 200 cycles at 0.5C, exhibiting significant improvement over its liquid-state counterparts and showing promising application potential.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Hai-lin Ren,Yang Su,Shuai Zhao,Cheng-wei Li,Xiao-min Wang,Bo-han Li
SiO x (0 < x < 2) has been considered as one of the most promising anodes for lithium-ion batteries due to its high capacity and more stable cyclic charging and discharging performance, but it still has the drawbacks of lower intrinsic conductivity and larger volume expansion compared to graphite. For this purpose, Sn, a homologous element of Si, is selected in this paper, and the SiO x @SnO 2 heterostructure is constructed on the SiO x surface using simple solvothermal and calcination methods. The combination of DFT analysis and experimental results shows that the heterogeneous structure enhances the Si-O bond strength in SiO x , and coupled with the localised stresses due to the lattice differences between SiO x and SnO 2 alleviates the volume change of SiO x during lithiation /de-lithiation. The reversible capacity was 536.8 mAh g -1 after 300 cycles at 1C and 1152.4 mAh g -1 after 200 cycles at 0.5C. The construction of SiO x @SnO 2 heterojunction will also bring the Fermi energy levels into the valence band, which makes the material exhibit some metallic properties and improves the electrical conductivity enhancing the Li + diffusion.
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
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Qingfen Zhang,Hongjin Tan,Fenglong Lin,Wayne Hsu,Shenglong Wang,Yincai Wu,Huihui Wang,Bangmin Li,Lijun Song
Silicon suboxide (SiOx) has been the subject of considerable research interest owing to its promising theoretical specific capacity and lower volume expansion compared with nano-silicon. However, improving its rate and cycling performance is crucial for practical applications. In this study, we propose a novel composite anode material of nano-SiOx encapsulated in a two-dimensional (2D) nitrogen and phosphorous (N/P) co-doped graphene-like nanosheet structure. In half-cell tests, the electrode with this active material exhibited a reversible capacity of 543.0 mA h g−1 at 400 mA g−1 after 100 cycles and 386.4 mA h g−1 at 1600 mA g−1, an improvement of two orders of magnitude compared with pristine micron-SiOx. A thorough study revealed that this excellent battery rate performance and capacity retention primarily resulted from the role played by the N/P co-doped 2D graphene-like framework, which not only effectively promoted the kinetics of ionic and electronic migration but also likely reduced the interfacial parasitic reactions in the electrolyte and mitigated volume expansion by forming a “caged” framework over nano-SiOx. Thus, this work demonstrates a simple and feasible method for the preparation of high-performance anode materials, offering a promising strategy to address the challenges of volume expansion and sluggish kinetics in SiOx-based anodes for lithium-ion batteries.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chuxiong Huang,Jingxi Liang,Huayan Xiao,Xiujuan Wei,Tiefeng Liu,Zhan Lin,Shuxing Wu
SiOx is a highly promising anode material for realizing high-capacity lithium-ion batteries owing to its high theoretical capacity. However, the large volume change during cycling limits its practical application. The development of a binder has been demonstrated as one of the most economical and efficient strategies for enhancing the SiOx anode’s electrochemical performance. In this work, a multifunctional binder (T-PGA) is fabricated by cross-linking γ-polyglutamic acid (PGA) and tannic acid (TA) for SiOx anodes. The introduction of TA into PGA helps to buffer the volume changes of the SiOx anodes, facilitate diffusion of Li+, and construct stable SEI layers. Benefiting from this proposed binder, the SiOx anode maintains a reversible capacity of 973.0 mAh g–1 after 500 cycles at 500 mA g–1 and the full cell, pairing with LiNi0.5Co0.2Mn0.3O2 cathode, delivers a reversible capacity of 133 mA h g–1 (73.2% retention) after 100 cycles. This study offers valuable insights into advanced binders that are used in high-performance Li-ion batteries.
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
危险品化学品经营许可证（带存储）