MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Zhiyuan Wang,Nan Yang,Li Ren,Xiaomei Wang,Xu Zhang
The high-capacity silicon oxide (SiO x ) is a promising anode candidate for lithium-ion batteries (LIBs), but the huge volume expansion during the cycle severely limits their practical application. Mesoporous SiO x is widely investigated as an effective solution due to the self-buffering inner-space. Nevertheless, both excessive and deficient inner-space have bad impacts on the anode material , so exploring a suitable pore volume is the top priority. In this work, an impressive and novel approach has been developed to prepare SiO x @C core-shell microspheres with different mesopores of SiO x . Vinyl-SiO 2 nanoparticles are gestated in the framework of sulfonated polystyrene (SCLPS) microspheres to form the vinyl-SiO 2 /SCLPS composites by vinyltriethoxysilane as the silicon source and in-suit catalyzed by SCLPS. Afterwards, the vinyl-SiO 2 /SCLPS are covered by resorcinol/formaldehyde polymer, and then the core-shell microspheres are carbonized to prepare SiO x @C. The inner pore space of SiO x can be controlled by adjusting the cross-linking degrees (CLDs) of the SCLPS microspheres. After comparison, SiO x -6@C with the most suitable porous structure is selected, which exhibits a large reversible capacity (761 mAh g −1 at 100 mA g −1 ) and acceptable cycling capacity (534 mAh g −1 after 150 cycles). This work provides novel insights on exploring an appropriate inner-space to overcome the challenge of volume expansion.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 16
·e202200440
·
IF 4.839
Yang Ling,Yuan Gao,Yan Peng,Shiyou Guan
Graphical Herein , we designed a core-shell structured nitrogen-doped carbon-encapsulated ordered mesoporous SiO x composite (SiO x @NC). The obtained composite electrode not only can effectively reduce the volume expansion, but also can effectively improve electronic conductivity and further enhance the charge and ion transfer kinetics. Benefitting from the above unique structural advantages, the obtained SiO x @NC electrode delivered the high lithium storage capability and excellent cycling stability. SiO x (0
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 10
·2200083
·
IF 0
Shiming Chen,Zijian Wang,Lu Wang,Zhibo Song,Kai Yang,Wenguang Zhao,Lele Liu,Jianjun Fang,Guoyu Qian,Feng Pan,Luyi Yang
Being considered as a promising anode material for next-generation lithium-ion batteries, silicon oxide (SiO x ) suffers from low initial coulombic efficiency and unstable solid–electrolyte interphase (SEI), which hinder its commercial use. To address these issues, herein, an optimized chemical prelithiation method is developed using a molecularly engineered lithium–biphenyl-type complex, which facilitates improved prelithiation efficiency. More importantly, owing to the reaction between the prelithiation agent and sodium carboxymethyl cellulose binder, a stable artificial SEI layer with hard inorganic particles embedded in soft organic matrix can be preformed on the surface of the SiO x anode after prelithiation. The preformed SEI layer remains stable during long-term cycling, contributing to significant improvement of capacity retention (87.4%) over pristine SiO x (68.6%) after 100 cycles at 0.2 C. Through demonstrating a hitherto unknown interfacial constructing strategy for SiO x , this study provides a fresh perspective on realizing high-capacity Si-based anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Haoqiang Ma,Chenxin Jin,Guojun Xu,Lijun Wen,Chuanbin Tu,Fugen Sun,Yong Li,Lang Zhou,Zhihao Yue
Silicon-carbon composites are considered as the most promising anode materials for lithium ion batteries . Currently, most silicon-carbon composites were prepared by solid nano‑silicon particles as the silicon source, which suffers from high price and uneven dispersion. Here, we used tetraethyl orthosilicate as the liquid silicon source and polyvinylpyrrolidone as the carbon source. Both were homogeneously mixed in the liquid phase, and then processed through electrospinning, carbonization and nitrogen-doped processes to obtain free-standing nitrogen-doped carbon coated silicon monoxide (N-doped C/SiO x ). When served as anode material, N-doped C/SiO x can possess a reversible capacity of 488 mAh g −1 at 0.5 C (0.6 A g −1 ) and 377 mAh g −1 at a high current density of 2 C (2.4 A g −1 ). In addition, copper foil is not used as a collector for free-standing electrode structure, and eliminates the coating process of traditional electrodes, which reduces production costs. It is proposed that a facile strategy to fabricate silicon-carbon composites with good electrochemical properties and cost-effective way for lithium ion batteries.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Materials
·
2024
·Vol. 4
·期 4
·N
·
IF 11.8
Kaiyuan Zhang,Jiarui Xing,Huili Peng,Jichao Gao,Shuheng Ai,Qiwang Zhou,Di Yang,Xin Gu
SiOx is an encouraging anode material for high-energy lithium-ion batteries owing to the following unique characteristics: a relatively high theoretical capacity, low operating potential, ample resource availability, and, most importantly, lower volume changes compared to Si. However, its utilization has been hindered by a significant ~200% volume change during lithiation and low conductivity, leading to the breakdown of anode materials and accelerated capacity degradation. This study presents a novel SiOx/G/C composite comprising SiOx nanoparticles, graphite, and carbon nanotubes fabricated through a simple ball milling and annealing process. This composite features a dual-carbon framework interconnected with SiOx via C–O–Si bonds, enhancing reaction kinetics and accommodating volume fluctuations. These enhancements translate into remarkable advancements in cycling stability and rate performance. Specifically, as-prepared SiOx/G/C exhibits a high capacity retention of ~700 mAh·g-1 over 500 charging/discharging times at 1.0 A·g-1. Furthermore, when incorporated into a full-cell configuration (SiOx/G/C//LiNi1/3Co1/3Mn1/3O2), this system demonstrates a reversible capacity of 113 mAh·g-1 over 100 cycles at 1.0 mA·cm-2, underscoring its practical viability.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Wenwen Deng,Shaocong Ni,Naiqi Hu,Ying Zhou,Zhong Jin
Silicon oxide (SiOx) has been widely studied due to its ultrahigh theoretical specific capacity for lithium storage. However, its inherent low electronic conductivity and large volume change before and after lithium insertion have limited its commercialization. To address this issue, we report the synthesis of SiOx@ZrO2@C ternary composite nanospheres by convenient and scalable wet chemistry and sintering processes. In the unique structure of 3D porous SiOx@ZrO2@C nanospheres, zirconium oxide (ZrO2) supplies high structural stability, while the amorphous carbon (C) layer helps to form a stable solid–electrolyte interface, suppress volume expansion, and greatly improve the conductivity. Electrochemical measurements demonstrate that the SiOx@ZrO2@C nanospheres exhibit a capacity retention of 72.2% after 500 cycles at 500 mA g–1. At a high current density of 800 mA g–1, the SiOx@ZrO2@C nanospheres can still deliver a capacity of 529.1 mAh g–1. This work provides a promising mass-scale synthesis method for producing SiOx composites and introduces a high-performance anode material for lithium-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zuojie Xu,Rong Huang,Pengfei Huang,Chaowei He,Shenwen Liu,Haonan Zheng,Wenlong Song,Lu Shi,Weiwei Gao,Dan Li,Hui Huang,Hangjun Ying,Wei-Qiang Han
Silicon oxide (SiO x ) anodes are considered to be the promising alternative to graphite anodes for lithium-ion batteries. However, the traditional carbonate electrolyte fails to generate the effective solid electrolyte interface (SEI) on SiO x anodes to well adapt the large volume expansion of SiO x particles. Herein, a weakly solvated perfluorinated electrolyte with dual lithium salts was designed to match SiO x anodes. The perfluorinated solvent with weakened solvation ability and the strong coordination of Li + -DFOB − and Li + -TFSI − lead to an anion-dominated solvated shell, which induces the formation of inorganics-rich SEI. The high-strength bonds (Li-F, B-F, B-O, B-N et al.) enable high mechanical strength and rapid ion migration of the SEI film, thereby effectively accommodating the volume expansion of SiO x and avoiding continuous decomposition of the electrolyte. Furthermore, as designed electrolyte also shows excellent flame retardancy and high voltage stability. Consequently, the SiO x anode exhibits remarkably improved cycling performance in contrast to that in traditional carbonate electrolyte, maintaining 1073.7 mAh/g after 300 cycles at 1.0 A/g when paired with metal Li, and presents excellent compatibility with commercial cathodes including LiFePO 4 and LiNi 0.8 Co 0.1 Mn 0.1 O 2 . This work provides a new inspiration and path for the design of electrolyte highly matched with silicon oxide anodes.
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
ACS Nano
·
2025
·
IF 16
Jing Li,Guifang Zeng,Sharona Horta,Paulina R. Martínez-Alanis,Jordi Jacas Biendicho,Maria Ibáñez,Bingang Xu,Lijie Ci,Andreu Cabot,Qing Sun
The SiOx anode exhibits a high specific capacity and commendable durability for lithium-ion batteries (LIBs). However, its practical application is hindered by significant volumetric fluctuations during lithiation/delithiation, alongside a metastable nature, which induces mechanical instability and irreversible lithium consumption, ultimately impairing long-term capacity retention in full-battery cell configurations. In this study, we present a phase-engineering approach designed to improve the structural stability of SiOx anodes for LIB applications. By incorporating lithium fluoride, amorphous SiOx undergoes partial transformation into a quartz-like phase, which enhances mechanical integrity and mitigates irreversible lithium loss. This modified anode demonstrates significantly improved stability and prolonged cycle lifespan. Through a combination of multiscale simulations and in situ characterizations, we elucidate the stabilization mechanisms conferred by the quartz phase, providing critical insights into the role of SiOx’s crystal structure in influencing degradation pathways. This work introduces an accessible and efficient method for controlling the crystallinity of SiOx, offering a practical solution to enhance the durability of high-energy-density 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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xudong Gao,Zuojie Xu,Lucheng Cai,Chaowei He,Haonan Zheng,Yijing Zhou,Mengya Wang,Fupu Liu,Qinglong Zhao,Xin Guo,Yuanchun Zhang,Hangjun Ying,Wei-Qiang Han
SiO x anode offers high theoretical capacity, enhancing the energy density of lithium-ion batteries. However, traditional electrolytes fail to form an effective solid electrolyte interphase on SiO x , necessitating electrolyte modification. Sulfone-based electrolytes are crucial for high-voltage electrolyte designs due to superior oxidation stability. Therefore, a tailored sulfone electrolyte for SiO x is essential to leverage its potential and match it with high-voltage cathodes. Herein, we report the design of a high-voltage-resistant, non-flammable sulfone-based locally high-concentration electrolyte (1.0 M LiTFSI +0.2 M LiDFOB in SL/HFE/FEC). The locally high-concentration design effectively addresses the high viscosity and low wettability issues of sulfone solvents. Furthermore, by optimizing salt concentration and employing additive engineering, we precisely controlled the organo-inorganic ratio of the SEI, resulting in the formation of a robust inorganic layer and a tough organic layer. This approach effectively suppressed the capacity drop observed during the long-cycle tests, allowing the SiO x ||Li half-battery to achieve a cycle life exceeding 750 cycles with an average coulombic efficiency of 99.7 %. Additionally, this electrolyte enhances the passivation effect of the cathode electrolyte interphase, enabling the SiO x ||NCM811 full battery to stabilize at 4.5 V.
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Xue Mu,Chuankai Fu,Renlong Li,Chunyu Du,Yunzhi Gao,Geping Yin,Pengjian Zuo
Silicon oxide (SiO x ), consisting of nanosized Si crystallites and oxide matrix (SiO y , y near 2), is regarded as one of the most promising anode materials for next-generation high energy density lithium-ion batteries (LIBs). Commonly, modulating oxygen content and surface chemistry are favorable to the lithium ions storage performances of SiO x anode. Here, an AlCl 3 –MgSO 4 assisted low-temperature (250 °C) etching technique is adopted to modify the commercial micron-sized SiO x anode, this novel modification method tunes the O/Si ratio on the surface of SiO x . Impressively, the modified SiO x anode exhibits a high reversible capacity of 480 mAh g −1 at 1A g −1 after 200 cycles and good rate capability of above 110 mAh g −1 at 10 A g −1 . This work provides a simple and feasible modification strategy to the development of high performance SiO x anode.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 21
·期 8
·2259-2267
·
IF 2.316
Zhang Ju,Gu Jingwei,He Hongyan,Li Mingqi
To suppress the volume change of silicon and enhance the conductivity of the electrodes, nano-Si@SiO x @C composites with different carbon content are synthesized, in which nano-Si is embedded in SiO x matrix and coated by pyrolyzed C. Among the as-prepared composites, nano-Si@SiO x @22.45 wt%C exhibits the best comprehensive electrochemical performance, which delivers a first reversible capacity of 1184 mAh g −1 with capacity retention of 93% after 150 cycles at 100 mA g −1 . Moreover, it also shows good rate capability. The excellent electrochemical performance is attributed to the special structure and rational composition of the composite, in which the combination of a modest amount of coating carbon and SiO x matrix not only effectively mitigates the volume effect of nano-Si particles but also guarantees a high reversible capacity.
研究领域:
材料科学
·
能源化学
·
电化学
·
纳米技术
·
储能材料
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yunwen Shen,Zhentao Sun,Pei Hu,Wei-Jun Cai,Yiwen Pan
High concentrations of redox substances in the solution may cause severe electrode potential drift, resulting in the inaccuracy of in situ measurements . Sulfide anion , a highly reductive substance, is the killer of all metal oxide electrodes because of its small size and strong surface activity. We first proposed to use SPEEK (SP) with silica-stabilized imidazole-type ionic liquid (ImIL) to fabricate a composite film (SP/SiO x /ImIL) to achieve a high anti-interference ability for metal electrodes. The composite film was especially designed to address the interference caused by sulfide anions and other small-sized anions ( i.e., I − , F − and ascorbic acid). The reduced proton conductivity was restored by introducing ImIL into SPEEK matrix. Open circuit potential tests showed that the potential of the SP/SiO x /ImIL modified IrO x electrode fluctuated within 0.3 mV in 30 min continuous test at a concentration of 10 −3 M Na 2 S, exhibiting good stability in moderately high sulfide solution. It also exhibited fast response and good reversibility. In addition, no potential drift was measured under other anions interferences. XPS survey verified that the Ir 4+ /Ir 3+ ratio of the IrO x electrode did not change before and after application in sulfide-containing solution, indicating that the SP/SiO x /ImIL composite film has good anion isolation capacity.
研究领域:
材料科学
·
电化学
·
环境监测
✓ 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）