JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Rusheng Fu,Yunsong Li,Yongkang Wu,Chengxu Shen,Chongzhao Fan,Zhaoping Liu
Silicon suboxides (SiO x , 0 < x < 2) have been shown commercial prospect in lithium-ion batteries because of relative high capacity and mild volume expansion. However, few methods are available to prepare oxygen-tunable SiO x . Herein, we introduce a bottom up strategy to realize the consecutively regulation of oxygen content in SiO x via stepwise oxidizing silicane/siloxene precursor. Experimental results show that x value rapidly increases up to 1.5 and then rises extremely to 2.0 with minor slope. Furthermore, theory calculations indicate oxygen is preferentially inserted into Si–Si bonds to form buckled Si–O–Si limited to SiO 1.5 H with higher driving force than the following Si–OH formation which is well consistent with the experimental results. Virtually, nominal SiO x is substantially the mixture of Si, SiO 0.5 , SiO, SiO 1.5 and SiO 2 with SiO 1.5 as the predominate component. Among the representative SiO x samples, SiO 1.47 exhibits the optimal electrochemical performance with reversible capacity of around 700 mAh g −1 and almost 100% capacity retention at 0.5C (1C = 1500 mA g −1 ) after 300 cycles because of higher Li-ions diffusivity and less fracture. In addition, 95.4% capacity retention is achieved after 100 cycles at 0.2C in full-cell system.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zhaojin Li,Mengjiao Du,Pengfei Liu,Di Zhang,Qiujun Wang,Huilan Sun,Qujiang Sun,Bo Wang
Adjusting the O distribution in the silicon suboxide (SiO x ) is a potentially feasible strategy to obtain high specific capacity and cycling stability simultaneously, but it has not been thoroughly studied. In this article, we find that controlling the Mg content and heating rates can result in significant differences in the O distribution of the prepared SiO x by magnesiothermic reduction. Astonishingly, the electrochemical performance of SiO x is closely related to the O distribution. When the ratio of surface O to core O is close to 2:1, this appropriate O distribution is beneficial for the overall performance of SiO x . As a result, the optimized s SiO x -0.95–10 °C electrode provides a high discharging capacity of 1470.2 mAh·g −1 at 0.1C and can maintain a capacity of 501.7 mAh·g −1 at 5 C. More importantly, a high-capacity retention of 622.5 mAh·g −1 can be obtained after 200 cycles for the optimized SiO x -0.95–10 °C electrode. Because increasing the surface O content can generate more Li 2 O during the lithiation process and alleviate the volume expansion of SiO x , while excessive surface O can reduce the electronic conductivity of the SiO x , affecting its cycling performance. This article provides new ideas and methods for obtaining SiO x anode with excellent comprehensive performance.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Chunyang Song,Feilong Zhang,Yafei Qiao,Shuang Tian,Zhilong He,Jie Gao,Yonggao Xia
To enhance the cycle stability of the SiOx anode in high-energy-density lithium-ion batteries from the perspective of electrode formulation, this paper investigates why SP is more suitable for SiOx than Gr, as well as the influence of SP content on the performance of the SiOx anode. The findings reveal that, compared to Gr, SP exhibits superior ionic conductivity . Moreover, the carbon binder domains (CBD) network formed by SP and the binder demonstrates a more effective buffering capacity against the volume expansion of SiOx than that of Gr. Additionally, SP is observed to elevate the lithium intercalation potential of SiOx, thereby endowing SiOx with a higher specific capacity. Nonetheless, the use of SP also introduces several challenges. On one hand, it can induce uneven lithium deposition on the composite electrode, leading to electrode cracking. On the other hand, the very low initial coulombic efficiency (ICE) of SP results in an irreversible loss of lithium ions on the cathode electrode side in a full cell configuration. Consequently, when designing a full cell, it is imperative to consider the inherent characteristics of SP, and optimization can be achieved by adjusting the negative/positive capacity ratio (N/P) or employing prelithiation methods.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2023
·
IF 3.2
Jizhe Wu,Chenxin Jin,Guojun Xu,Huaide Chen,Bin Lu,Xiaomin Li,Fugen Sun,Lang Zhou,Zhihao Yue
Silicon monoxide (SiO x , 0 < x < 2) has been one of the new directions of scientific researchers because of some characteristics, such as higher theoretical specific capacity and lower volume expansion efficiency. However, its disadvantages such as the volume expansion effect and poor conductivity still exist in the process of charge and discharge, which limit its commercialization process. In this paper, cuprous oxide and carbon coated silicon monoxide (SiO x /C/Cu 2 O) composites were obtained by high temperature heat treatment. In the SiO x /C/Cu 2 O anodes, carbon can buffer the volume expansion of the lithium intercalation, enhance the conductivity of the material, reduce the contact between the electrolyte and the active substance, Cu 2 O can further reduce the contact between the electrolyte and the active substance, greatly buffer the change of electrode structure and improve the overall cycling performance. After the rate of 0.5C (1C = 2100 mA g −1 ) for 500 cycles, the discharge specific capacity is 704.0 mAh g −1 , about 350 mAh g −1 higher than SiO x , which shows excellent long-cycle ultra-high stability.
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
Journal of Energy Chemistry
·
2023
·
IF 13.1
Renlong Li,Binghan Cui,Qingjie Zhou,Xue Mu,Yunzhi Gao,Geping Yin,Chuankai Fu,Pengjian Zuo
Macro- and micro-interface instability of SiO x anode caused by its dramatic volume variation during cycling will result in low Coulombic efficiency and rapid capacity degradation. In this work, an organic-inorganic composite interfacial layer rich in benzene ring groups, polyisocyanates, and LiF was obtained on SiO x anode by the introduction of 4-fluorophenyl isocyanate (FPI) and fluoroethylene carbonate (FEC) co-additives in electrolyte. The SiO x anode material shows a capacity retention of 69.2% after 100 cycles at a current density of 1 A g −1 and rate capacity of 523 mA h g −1 at the current density of 3 A g −1 , while the SiO x anode cycling in reference electrolyte has almost no capacity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shuoyang Qiu,Zhou Huang,Fangbao Fu
Silicon oxide (SiO x ) exhibits promising potential as a lithium-ion battery anode. However, its practical application is impeded by low electrical conductivity and significant volumetric expansion. To overcome these limitations, we developed a novel co-precipitation and selectively etching approach that leveraged the nitrogen-retaining effect of ZnNCN to prepare an edge-nitrogen-enriched carbon/SiO x composite (NEC@LC-SiO x ). This NEC@LC-SiO x showed enhanced electrical conductivity and reduced volumetric expansion. Our innovative approach effectively prevented excessive decomposition of nitrogen species, resulting in a high nitrogen doping content of 21.67 at.% while maintaining a stable structure and mitigated volume expansion during charging and discharging. Consequently, the prepared NEC@LC-SiO x exhibited excellent performance as an anode material for lithium-ion batteries, demonstrating a high reversible specific capacity of 802 mAh/g and outstanding rate capability. This work presents a novel strategy for designing high-performance SiO x anode materials.
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 Omega
·
2021
·
IF 3.512
Haoyuan Liu,Encheng Huangzhang,Chenhao Sun,Yanchao Fan,Zhen Ma,Xiaoyang Zhao,Junmin Nan
A silicon suboxide–carbon (SiOx/C, 1 ≤ x ≤ 2) composite anode of lithium-ion batteries (LIBs) with enhanced performance is prepared using an aqueous multicomponent binder technology. Considering the adhesive force, electrolyte absorption, and stability, different binders including sodium alginate (SA), polyacrylamide gel (PAM), polytetrafluoroethylene (PTFE), and their composites are evaluated. It is indicated that compared to other anodes with single- or multicomponent binders, the SiOx/C composite anode with PAM/SA/PTFE663 (PSAP663) binders exhibits strong adhesion, moderate electrolyte absorption ability, and a specific capacity of 427 mA h g–1 charge–discharged at 0.5 A g–1 after 300 cycles. The improvement of electrochemical performance is attributed to the comprehensive effects of composite binders, including the adhesion of active substances, surface protection, solution adsorption, conductive path, and so on. These results show that the PSAP663 binder has promising potential for application, which not only gives alternative practical schemes of the green binders for the SiOx/C anodes but also provides ideas to develop a high-performance adhesive technology for LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROCERAMICS
·
2025
·
IF 2.6
Lin Cheng,He Yuchan,Zhuang Wuyi,Chen Sili,You Zhixian,Zhao Guiying,Huang Zhigao,Li Jiaxin
The development of high-performance silicon/silicon oxide (Si/SiO x ) anodes has attracted great attention in the field of next-generation high-energy lithium-ion batteries (LIBs). However, preparing effective Si/SiO x composite materials to address issues such as poor cycling stability, subpar initial coulombic efficiency (ICE), and subpar interface compatibility remains a challenge. This work proposes a simple strategy for preparing Fe/Fe 3 C particle modified thin-layer carbon-coated Si/SiO x composite materials using a mixture of resorcinol formaldehyde (RF) precursor pyrolysis and ultrasonic treatment (referred to as C@Si/SiO x -Fe/Fe 3 C, abbreviated as CSSO-Fe/Fe 3 C). These composite materials are used as anodes for LIBs. Exploiting the benefits of its structure and composition, the CSSO-Fe/Fe 3 C anode offers a high ICE value of 68.7% and maintains a capacity of 563.2 mAh g −1 even after 1200 cycles at a current density of 2.5 A g −1 . Comprehensive characterization and electrochemical studies have elucidated the interface compatibility and structural stability mechanisms induced by the small amount of Fe/Fe 3 C doping and carbon coating, which explain the high capacity and stable cycling performance. Furthermore, when paired with LiCoO 2 cathode, the assembled LiCoO 2 ||CSSO-Fe/Fe 3 C coin-type full battery has a capacity of 80.7 mAh g −1 and a capacity retention rate of 76.6% after 200 cycles at 1.0 C. This synthesis approach offers valuable insights for designing high-performance Si/SiO x electrode materials.
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
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Ziqiao Yan,Xiujuan Wei,Wenwei Zhang,Lin Xu,Jie Zhang,Shuxing Wu,Kai-Hang Ye,Zeheng Li,Zhan Lin,Jun Lu
The rapid capacity decay of microsized SiO x anode resulting from large volume change hinders its commercial application. Herein, a polymer binder with strong interfacial adhesion and high stress dissipation is designed to alleviate the volume change of microsized SiO x anode and maintain structural integrity of electrode. The density functional theory calculations (DFT) and X-ray photoelectron spectroscopy (XPS) reveal that the multifunctional polymeric network enhances interfacial contact between the binder and silicon oxide (SiO x ) particles through gradient hydrogen bonds. Additionally, the designed binder exhibits high mechanical strength and self-healing function via the synergy of supramolecular and covalent chemistry. The designed binder enables SiO x electrodes to exhibit notable cycling stability and superior rate performances. This work provides valuable insights into the structure-function relationship of binder for high-capacity SiO x anodes.
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
ChemElectroChem
·
2019
·Vol. 6
·期 5
·1574-1581
·
IF 3.975
Pu Wang,Shuang Hou,Fang Pang,Miao Liu,Yanxin Li,Tiezhong Liu,Yizhen Luo,YaMeng Fan,Lingzhi Zhao
Graphical In the mill : Unique hierarchical mosaic-structure SiO x /C@CoO nanosheets, with both SiO x and graphite particles embedded in a CoO layered structure, are successfully fabricated through a high-energy ball-milling process and through a one-step hydrothermal process to form a 3D hierarchical mosaic structure. The unique combination of the CoO and SiO x /C can accommodate the large volume changes and retain the structural integrity of the nanosheets, maintaining the cycling stability and rate capability of SiOx/C@CoO electrode materials. Unique hierarchical mosaic-structure SiO x /C@CoO nanosheets were successfully synthesized from SiO x /C nanospheres embedded in CoO nanosheets through a high-energy ball milling and hydrothermal self-assembly process. The SiO x /C@CoO material exhibited good cyclic performance with a reversible discharge capacity of 1079 mAh g −1 over 250 cycles at a current density of 1000 mA g −1 . It also displayed an excellent rate capability (with an average specific reversible discharge capacity of 777.8 mAh g −1 at 2000 mA g −1 and 480 mAh g −1 at 5000 mA g −1 ). The stable skeleton structure of SiO x /C-embedded CoO nanosheets and the synergistic effect between the two materials should be responsible for the improvement of the lithium storage. This work proposes a feasible approach to promote CoO application in lithium-ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xianhuan Zhuang,Pingan Song,Guorong Chen,Liyi Shi,Yuan Wu,Xinyong Tao,Hongjiang Liu,Dengsong Zhang
Balancing the size of the primary Si unit and void space is considered to be an effective approach for developing high performance silicon-based anode materials and is vital to create a lithium ion battery with high energy density. We herein have demonstrated the facile fabrication of coralloid-like nanostructured silicon composites (c-nSi/SiOx@Cy) via sulfuric acid etching the Al60Si40 alloy, followed by a surface growth carbon layer approach. The HRTEM images of pristine and cycled c-nSi/SiOx@Cy show that abundant nanoscale internal pores and the continuous conductive carbon layer effectively avoid the pulverization and agglomeration of Si units during multiple cycles. It is interesting that the c-nSi/SiOx@C4.0 anode exhibits a high initial Coulombic efficiency of 85.53%, and typical specific capacity of over 850 mAh g–1 after deep 500 cycles at a current density of 1 A g–1. This work offers a facile strategy to create silicon-based anodes consisting of highly dispersed primary nano-Si units.
研究领域:
材料科学
·
储能技术
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2019
·
IF 1.388
Yue Lu,Peng Chang,Libin Wang,Joseph Nzabahimana,Xianluo Hu
Silicon (Si) has been considered as one of the most promising anode materials in lithium-ion battery. However, practical applications of Si are hindered by undesirable cycling stability resulting from poor electrical conductivity and huge volumetric change during cycling process. Here, we prepared a yolk-shell silicon/carbon composite by etching carbon-coated heat-treated silicon monoxide (SiO) precursor. The as-prepared Si/SiO x @Void@C composite of inner silicon/silicon oxides and outer carbon shell with voids between them (Si/SiO x @Void@C), shows impressive cycling stability (1020 mAh g − 1 at 1 A g − 1 over 200 cycles) and excellent rate performance (775 mAh g − 1 at 6 A g − 1 ). The remarkable electrochemical performance is due to the enhanced electrical conductivity originated from the carbon shell and the volume buffer effect of the yolk-shell structure. A combination of the yolk-shell structure with Si/C composites is believed to be a promising way to improve the performance of Si-based materials in lithium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）