CELLULOSE
·
2022
·Vol. 29
·期 15
·8293-8303
·
IF 6.123
Yue Shuangshuang,Wang Shuanjin,Han Dongmei,Huang Sheng,Xiao Min,Meng Yuezhong
A transparent perhydropolysilazane-derived-SiO x coated cellulose film with high gas barrier properties was fabricated via a facile solution dip-coating followed by UV curing method. The conversion of perhydropolysilazane to SiO x was proved by ATR-FTIR, XPS and TOF–SIMS characterizations. AFM and SEM images revealed the smoothness of the coating and good adhesion between the cellulose substrate and the coating. The thickness of the SiO x coating (50–450 nm) can be tuned by changing the concentration of the perhydropolysilazane precursor solution. The cellulose film (35 µm in thickness) with 450 nm thick SiO x coating exhibits low oxygen transmission rate (OTR) value of 0.82 cm 3 /m 2 ·day and water vapor transmission rate (WVTR) value of 1.28 g/m 2 ·day. The excellent oxygen and water vapor barrier properties, ultrahigh transparency and complete biodegradability of the SiO x coated cellulose film endow it competitive potential for packaging applications. Graphical abstract A transparent perhydropolysilazane-derived-SiO x layer is tightly coated on a cellulose film via a facile solution dip-coating followed by UV curing method. The sandwich structured cellulose-SiO x films show excellent oxygen and water vapor barrier properties as well as ultrahigh transparency and complete biodegradability, which has a great potential for food, medicine and other packaging applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Fujuan Han,Zenghua Chang,Rennian Wang,Fengling Yun,Jing Wang,Chenxi Ma,Yi Zhang,Ling Tang,Haiyang Ding,Shigang Lu
LiNi0.8Mn0.1Co0.1O2||SiOx@graphite (NCM811||SiOx@G)-based lithium-ion batteries (LIBs) exhibit high energy density and have found wide applications in various fields, including electric vehicles. Nonetheless, its low-temperature performance remains a challenge. One of the most efficacious strategies to enhance the low-temperature functionality of battery is the development of appropriate electrolytes with low-temperature suitability. Herein, p-tolyl isocyanate (PTI) and 4-fluorophenyl isocyanate (4-FI) are used as additive substances to integrate into the electrolytes to improve the low-temperature performance of the battery. Theoretical calculations and experimental results indicate that PTI and 4-FI can both preferentially generate a stable SEI on the electrode surface, which is beneficial to reduce the interfacial impedance. As a result, the additive, i.e. 4-FI, is superior to PTI in improving the low-temperature performance of the battery due to the optimization of F in the SEI membrane components. At room temperature, the cyclic stability of the NCM811/SiOx@G pouch cell increases from 92.5% (without additive) to 94.2% (with 1% 4-FI) after 200 cycles at 0.5 C. Under the operating temperature of −20 °C, the cyclic stability of the NCM811/SiOx@G pouch cell increases from 83.2% (without additive) to 88.6% (with 1% 4-FI) after 100 cycles at 0.33 C. Therefore, a rational interphase design involving the modification of the additive structure is a cost-effective way to improve the performance of LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 39
·32798-32803
·
IF 3.289
Xuejun Bai,Biao Wang,Huaping Wang,Jianming Jiang
The carbon fiber-supported SiOx (CF–SiOx) composites are in situ fabricated using a facile two-step method and evaluated as anodes for lithium-ion batteries (LIBs). The CF–SiOx anodes exhibit a reversible capacity of 1100 mA h g−1 at 50 mA g−1 after a high current charge–discharge cycling test with a capacity retention of 80% (compared with the first 5 cycles). This superior performance of the CF–SiOx are due to the modification of SiOx with the profiled carbon fibers, which effectively construct a continuous conducting network and thus enhance the electrochemical activity of SiOx. The profiled carbon fibers have numerous surface grooves to provide high contact area for rapid lithium-ion transport and enough inter-fiber space for the accommodation of large SiOx volume changes on lithium insertion and extraction.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiahong Fan,Siwei Jiang,Yazecheng Liu,Xintao Wu,Peng Hu,Jun Yao,Yao Yao,Jiyue Hou,Yannan Zhang,Yingjie Zhang,Zhongren Zhou,Ning Du,Peng Dong
Silicon suboxide (SiOx) anode materials are sought to substitute graphite-based anodes due to their high theoretical capacity and lower volume expansibility. Present chemical vapor deposition industrial production inevitably produces about 15 wt % submicro SiOx wastes. To improve the reuse of submicro SiOx wastes in a more economical, efficient, and sustainable way, present research focuses on exploring spherical porous SiOx/poly(acrylic acid) (PAA) microparticles via a spray-drying process to enhance resilience and adhesivity. The PAA polymer membrane uniformly coats the SiOx matrix via strong hydrogen bond interactions, providing mechanical strength to whole particles. The availability of polymer also possesses excellent electrochemical stability and adhesion, remaining almost free from pulverization during cycling. In half-cell testing, the synthesized micro SiOx/PAA particles demonstrate a higher initial capacity efficiency of 68% compared to that of submicro SiOx and a high reversible capacity of 1102 mAh g–1 with a fading rate of 0.036% per cycle after 200 cycles at 2 A g–1. Even after 1000 ultralong cycles, the capacity still remains above 200 mAh g–1. The full-cell measurement shows a capacity of 160.25 mAh g–1 for 600 cycles, suggesting their practicality for industrial production. Microsized SiOx anodes have shown impressive performance, achieving high Coulombic efficiency (>99.8%), exceptional rate capability, and outstanding cycling stability over 600 cycles.
研究领域:
材料科学
·
能源存储
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Binbin Xu,Honglie Shen,Jiawei Ge,Quntao Tang
Silicon suboxide (SiO x ) is considered as one of the potential candidates for next-generation lithium-ion battery (LIB) anode materials. However, the application of this material is limited by volume change during the discharging and charging process and its low initial cycle Coulombic efficiency (ICE). Herein, we report a controllable and cost-effective route to synthesize the SiO x /MgO/Mg 2 SiO 4 /C (SMC) composite using magesiothermic reaction (MTR), hot-water treatment, and carbonization process. Moreover, the composite exhibits a hierarchical buffer structure composed of microspheres . Because of its special dehydration ability to disrupt the hydrolytic cycle, the introduction of MgO is proved to be beneficial to LIBs’ cycling performance and rate capability. Besides, with the formation of Mg 2 SiO 4 , the consumption of SiO 2 improves the ICE of the SMC anode to 87.48%. The hierarchical microstructure makes the resultant SMC anode exhibit a stable reversible capacity of 550 mAh g −1 , which means a high capacity retention ratio of 78.81% after 200 cycles. Furthermore, the specific capacity of SMC anode keeps around 600 mAh g −1 at the current density of 800 mA g −1 , showing superb rate performance. This work provides a novel approach to taking advantage of by-products of MTR and also demonstrates the potential of industrial application of SiO x /C anodes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yu Cao,Chao Ma,Qingxu Zhang,Xixi Shi,Gang Liu,Xizheng Liu
Silicon-based anodes are the most promising candidates for advanced Li ion batteries (LIBs) with energy density over 400 Whkg −1 due to its high theoretical specific capacity. However, their scale applications are still restricted by the performance fading due to particle pulverization, electrode fracture as well as high production cost. Herein, we report a hierarchical porous structured SiO x (HP-SiO x ) prepared by a facile method of etching porous diatomite. It is primarily composed of crystalline silicon and amorphous silicon oxide. The optimized porous HP-SiO x demonstrates a hierarchical pore structure with 20-80 nm pores on the wall of macropores. The macropores could well accommodate the volume expansion during deeply lithiation, while the interconnected pores promote electrolyte permeation. Evaluated as anode in LIBs, it displays a discharge capacity of 668.5 mAhg −1 after 100 cycles, it gives a discharge capacity of 330mAh/g even at a higher current density of 500 mAhg −1 . The thickness of cycled HP-SiOx anode only expands by 60 % after 10 cycles, while other reported SiO anodes normally expand over 110 %. Moreover, the ionic conductivity of HP-SiO x anodes range from 7.24 × 10−9 cm 2 /s to 3.87 × 10−11 cm 2 /s. These improvement in electrochemical performance can be attributed to the fabrication of a hierarchical porous structure, which buffers the volume expansion during lithiation and facilitates ionic transportation within the electrode. The abundant resource of diatomite endows the large-scale, low-cost production of this hierarchical porous SiO x and underscore the potential for commercial applications in lithium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Guoyong Lai,Xiujuan Wei,Binbin Zhou,Xiuhuan Huang,Weiting Tang,Shuxing Wu,Zhan Lin
Micron-sized silicon oxide (SiOx) has been regarded as a promising anode material for new-generation lithium-ion batteries due to its high capacity and low cost. However, the distinct volume expansion during the repeated (de)lithiation process and poor conductivity can lead to structural collapse of the electrode and capacity fading. In this study, SiOx anode materials coated with TiO0.6N0.4 layers are fabricated by a facile solvothermal and thermal reduction technique. The TiO0.6N0.4 layers are homogeneously dispersed on SiOx particles and form an intimate contact. The TiO0.6N0.4 layers can enhance the conductivity and suppress volume expansion of the SiOx anode, which facilitate ion/electron transport and maintain the integrity of the overall electrode structure. The as-prepared SiOx-TiON-200 composites demonstrate a high reversible capacity of 854 mAh g–1 at 0.5 A g–1 with a mass loading of 2.0 mg cm–2 after 250 cycles. This surface modification technique could be extended to other anodes with low conductivity and large volume expansion for lithium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料工程
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2020
·Vol. 6
·期 7
·1127-1135
·
IF 3.384
Zuxin Long,Rusheng Fu,Jingjing Ji,Zuyong Feng,Zhaoping Liu
As a promising lithium-ion battery anode materials, silicon suboxides (SiO x ) exhibit elusive microstructure with atomic-scale disproportionation which reveals a strong relation to performance. Generally, the structure of SiO x could be tuned via high-temperature treatment. In this work, disproportionated SiO x are prepared to systematically discuss the internal relationship among microstructure, physicochemical properties and electrochemical performance. After annealing, amorphous SiO 2 and nanocrystalline Si appear, and the SiO 2 accumulating on the surface results in large resistance and low Li-ion diffusivity, which leads to large overpotential and poor performance. If mechanical milling is employed followed by annealing, the SiO 2 layer can be crushed, SiO x and Si with electrochemical activity are uncovered. Further research on the SiO x with diverse degrees of disproportionation indicates that proper amount of Si and SiO 2 determines the optimal electrochemical performance. This result gives an in-depth understanding and probable guidance to the modification investigation of SiO x anode for Li-ion batteries.
研究领域:
材料科学
·
电化学
·
储能
·
纳米材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Gang Wu,Zheng Weng,Jiaqi Li,Zhicheng Zheng,Zuxin Wen,Wenqiang Fang,Ying Zhang,Ning Zhang,Gen Chen,Xiaohe Liu
The high specific capacity and relatively low volume expansion of silicon suboxide (SiOx) highlight its potential as one of the most promising anode materials for lithium-ion batteries. Nevertheless, the traditional binder of polyacrylic acid (PAA) still cannot adapt to enormous stress during the repeated volume expansion/contraction owing to its intrinsic rigid backbone. Inspired by the “soft and hard composite body armor”, we herein design a double-wrapped binder consisting of PAA with a high internal Young’s modulus (hard part) and polyurethane (DOU) with a low external Young’s modulus (soft part). When the SiOx particle expands during lithiation, the rigid PAA firstly accommodates the volume change to dissipate most of the inner stress, and the elastic DOU with triple dynamic bonds serves as a buffer layer to absorb the residual stress via the breakage/formation of dynamic bonds. By optimizing the PAA/DOU ratio, the SiOx anode can maintain the integrity during long-term cycling and deliver a relatively high reversible capacity of 1064.1 mAh g–1 with a preeminent capacity retention of 83.7% at 0.5C after 300 cycles. Such a double-wrapped binder can provide a novel design strategy for multicomponent functional polymer binders toward high-performance SiOx anodes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 8
·4183-4189
·
IF 8.867
Zhaohuai Li,Qiu He,Liang He,Ping Hu,Wei Li,Haowu Yan,Xianzhou Peng,Congyun Huang,Liqiang Mai
Silicon oxide (SiOx) shows great potential for lithium ion battery (LIB) anodes due to its high capacity, environmental friendliness, low cost and high abundance. Herein, we used low-cost mesoporous silica spheres to synthesize core–shell structured porous carbon-coated SiOx nanowires (pC–SiOx NWs) as a new LIB anode through a novel self-sacrificed method. The one-dimensional structure can accommodate large volume expansion without breaking. The porous carbon coating hinders the penetration of the electrolyte into pC–SiOx NWs and formation of a stable solid-electrolyte interphase (SEI) film on the external surface of pC–SiOx NWs. As a result, the composite shows excellent cycling stability with high reversible specific capacities of 1060 mA h g−1 (100 cycles) and 623 mA h g−1 (150 cycles) at current densities of 100 mA g−1 and 500 mA g−1, respectively. The proposed facile and scalable synthesis is highly competitive for large-scale applications in lithium storage devices/systems.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaotian Guo,Wenting Li,Pengbiao Geng,Qinyi Zhang,Huan Pang,Qiang Xu
Silicon sub-oxides (SiO x ) are increasingly becoming a prospective anode material for lithium-ion batteries (LIBs). Nevertheless, inferior electrical conductivity and drastic volume fluctuation upon cycling significantly hamper the electrochemical performance of SiO x . In this work, rice husks (RHs)-derived pitaya-like SiO x /nitrogen-doped carbon (SNC) superstructures have been prepared by a simple electrospray-carbonization approach. SiO x nanoparticles (NPs) are well-dispersed in a spherical nitrogen-doped carbon (NC) matrix. The carbon frameworks discourage the aggregation of SiO x NPs, facilitating the kinetics for ion diffusion and charge transfer, and maintaining structural stability upon cycling, thus bringing about improved electrochemical performance. When the optimized SNC superstructures with SiO x content of 64.3% are utilized as LIBs anodes, a stable specific capacity of 622.8 mA h g −1 after 100 cycles at 0.1 A g −1 , and an excellent long cycle performance of 190.1 mA h g −1 after 5000 cycles at 5 A g −1 are obtained. This effective and universal synthetic strategy for fabricating controllable superstructures offers insights into the development of high-performance 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 PHYSICS LETTERS
·
2020
·
IF 2.029
Taolin Zhao,Yu Meng,Husheng Yin,Kejun Guo,Rixin Ji,Guanglei Zhang,Yuxia Zhang
The electrochemical performance of SiO x /graphite anode have been improved by using water-soluble binder. When using sodium carboxymethyl (CMC) as binder, the initial Coulombic efficiency, rate capability and charge transfer impedance have been improved. The first discharge specific capacity of SiO x /graphite can reach to 686.2 mAh g −1 when using guar gum (GG) as binder. In addition, various hybrid binders of CMC/GG are investigated to improve the cycle stability and reversible specific capacity synchronously. The results reveal that mixing two water-soluble binders in an appropriate proportion can give play to the respective advantages of the two components.
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
危险品化学品经营许可证（带存储）