NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 13
·6405-6411
·
IF 3.3
Xiaoming Zhou,Yang Liu,Liming Chen,Guohui Yuan
High-performance SiOx/C composites are currently one of the potential anodes for practical lithium-ion batteries. However, the dispersion of carbon in previous SiOx/C composites is usually uneven at the microscopic scale, where the anisotropic volume expansion generates continuous attenuation of coulombic efficiency in long-term cycling, resulting in a poor cycling performance. In the research reported here, the monodisperse SiOx/C spheres with a size of 200–1000 nm are prepared by a simple chemical polymerisation combined with high-temperature carbonisation. 3-Aminopropyltriethoxysilane and glutaraldehyde are selected as the silicon and carbon sources to form the spherical polymer by an aldimine condensation reaction. The organic carbon in the precursor is transformed in situ into amorphous carbon, which is uniformly located in the Si–O–Si framework at the ultrafine nanoscale. Because of the unique structural nature, the synthesised SiOx/C spheres demonstrate a long service lifespan together with a high coulombic efficiency. This work provides a practical design for reliable SiOx/C anodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Fuyang Jiang,Yi Sun,Kuanxin Zhang,Yongchao Liu,Xuyong Feng,Hongfa Xiang
SiO x is considered to be a promising anode material for lithium-ion batteries (LIBs) due to the high lithium storage capacity. However, the large initial irreversible capacity loss and intensive volume change during cycling hinder its commercial applications. Prelithiation is an effective and convenient strategy to improve the initial Coulombic efficiency (ICE) of SiO x , while incomplete and unstable SEI on the prelithiated anode still results in rapid capacity decay. Herein, through the synergy effect of chemical pre-lithiation process and fluoroethylene carbonate reduction, a compact and stable LiF-rich SEI layer is in-situ formed on the surface of prelithiated SiO x anode. The modified SiO x anode exhibits a high ICE of 90.7% with good cycling performance. When paired with the commercial LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode, the assemble pre-Li-SiO x /C||NCM622 full cell exhibit a high ICE of 85.7% and stable cycling stability. This work provides a new insight in constructing favorable SEI in pre-lithiation process.
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
·
2019
·Vol. 16
·期 5
·1905736
·
IF 10.856
Donglin He,Ping Li,Wei (Alex) Wang,Qi Wan,Jian Zhang,Kai Xi,Xiumei Ma,Zhiwei Liu,Lin Zhang,Xuanhui Qu
Although silicon-based materials are ideal candidate anodes for high energy density lithium-ion batteries, the large volumetric expansion seriously damages the integrity of the electrodes and impedes commercial processes. Reasonable electrode design based on adjustable structures of silicon and strong binders prepared by a facile method is still a great challenge. Herein, a three-pronged collaborative strategy via hollow nanocubes, amorphous Void@SiO x @C, and in situ cross-linked polyacrylic acid and d -sorbitol 3D network binder (c-PAA-DS) is adopted to maintain structural/electrode integrality and stability. The all-integrated c-PAA-DS/Void@SiO x @C electrode delivers excellent mechanical property, which is attributed to ductility of the c-PAA-DS binder and high adhesion energy between Void@SiO x @C and c-PAA-DS calculated by density functional theory. Benefiting from the synergistic effect of accommodation of the hollow structure, protection of outer carbon shell, amorphous Void@SiO x @C, and strong adhesive c-PAA-DS binder, c-PAA-DS/Void@SiO x @C shows excellent electrochemical performance. Long cycling stability with a reversible capacity of 696 mAh g −1 is obtained, as well as tiny capacity decay after 500 cycles at 0.5 A g −1 and high-rate performance. The prelithiated Void@SiO x @C||LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) full cell is also assembled and shows a reversible capacity of 157 mAh g −1 at 0.5 C, delivering an excellent capacity retention of 94% after 160 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Zhaoyu Zhang,Yufei Zhang,Minghui Ye,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
SiO x /C composites are highly potential anode alternatives for next-generation lithium-ion batteries (LIBs) owing to their low cost and high theoretical capacity. However, the sluggish lithium-ion diffusion kinetics severely limit their practical capacity and rate performance. Herein, a high-capacity and high-rate anode based on commercial SiO x /C is facilely achieved by in situ constructing a Li + conductive interphase (LCI) to simultaneously boost the transport efficacy of Li + ions and buffer the volume expansion. The as-designed, LCI-protected SiO x /C anode delivers an exceptionally high capacity of 1420.9 mAh g −1 at 0.2 A g −1 , excellent rate performance (91.4% capacity retention from 0.2 A g −1 to 1 A g −1 ) and long cycling stability, substantially outstripping the pristine SiO x /C counterpart and most recently reported Si-based electrodes. More importantly, taking advantages of the fast and stable lithiation/delithiation processes, this electrode can also be adapted to further applications at large current densities (766.44 mAh g −1 at 5 A g −1 ) or high mass loadings (5.02 mAh cm −2 at 0.1 A g −1 , ∼3.5 mg cm −2 ). A full battery with satisfactory electrochemical performance is also demonstrated. The strategy of building ion conductive interphase to subtly tailor the transport behavior of Li + ions is anticipated to unlock the practical deployment of Si-based LIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xinxin Sun,Zhiyuan Wang,Haohui Zhang,Kaize Si,Xiaomei Wang,Xu Zhang
SiO x anodes are garnering significant interest in lithium-ion batteries (LIBs) due to theirs low voltage plateau and high capacity. However, critical drawbacks, including high expansion rate and low electronic conductivity, severely limit their practical applications. While 0D, 1D, and 2D scale nanostructures have been proven to mitigate these issues, these materials tend to accumulate after prolonged cycling, leading to adverse effects on the mass transfer processes within the electrode. Herein, we have developed a honeycomb-like SiO x /C nanoarchitecture with carbon coating based on a 3D ordered macroporous (3DOM) structure. The 3D interconnected pore windows facilitate the diffusion and transport of lithium ions (Li + ) in the electrolyte, and the extremely thin walls (<15 nm) provide a shorter transport path for Li + in the solid. The carbon cladding buffers volume expansion and enhances electronic conductivity. The as-prepared anode demonstrates a high reversible capacity of 1068 mAh/g and an initial coulombic efficiency of 70.7 %. It maintains a capacity of 644 mAh/g (capacity retention of 84.63 %) even at a high current of 1.0 A/g after 700 cycles. The unique honeycomb-like structure offers enormous insights into the study of energy storage in 3D materials.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
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
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
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
Journal of Energy Storage
·
2024
·
IF 8.9
Xuexian Yu,Jun Liu,Junmin Wu,Sainan Ma,Yingwu Luo,Xiang Gao
Among practical anode materials for next-generation lithium-ion batteries (LIBs), SiO x has garnered substantial attention owing to its relatively low volumetric variation and high theoretical capacity. Nevertheless, the volumetric change of micro-SiO x remains a formidable challenge for existing adhesives. Here, we propose an innovative design strategy that amalgamates both rigidity and flexibility, in which rigid anion gum Arabic (GA), flexible acrylic random copolymer (ARC), and carbon nanotubes (CNTs) interwoven into a 3D network with strong interfacial adhesion and excellent mechanical properties. These attributes effectively restrict SiO x particles and favor a stable solid electrolyte interphase (SEI) layer formed on SiO x . Here, GA plays a pivotal role in dispersing CNTs and maintaining their consistent proximity to SiO x , thereby establishing stable electron conduction networks. The SiO x electrode still sustains a specific capacity of 760 mAh g −1 after 350 cycles under a high current of 1C. Additionally, at 0.2C, the SiO x electrode attains a notably high capacity of 1105 mAh g −1 with a capacity retention of 72.9 % at the 300th cycle, while exhibiting an excellent areal capacity of 1.4 mAh cm −2 even after 400 cycles. This work develops a straightforward yet highly efficacious approach for fabricating high areal capacity electrodes and offers promising prospects for improving the stableness of Si-based anodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
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
·
能源存储
✓ 已验证
产品关联
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
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 11
·e202200202
·
IF 4.839
Yang Ling,Yuan Gao,Yan Peng,Shiyou Guan
Graphical Herein, we fabricated a novel porous SiOx/C nanohybrids , in which carbon and SiOx not only exhibited uniform distribution at the nanoscale, the stability of SiOx/C network can also be easily adjusted via controlling the hydrolysis and condensation rate of precursors in situ. Benefiting from the unique network structure and excellent structural stability, the SiOx/C(50) shows excellent electrochemical performance in LIBs. Silicon oxides (SiOx, 0
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
危险品化学品经营许可证（带存储）