ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 36
·2303020
·
IF 19
Yi Sun,Kuanxin Zhang,Run Chai,Yueda Wang,Xianhong Rui,Kang Wang,Huaxia Deng,Hongfa Xiang
Considered the promising anode material for next-generation high-energy lithium-ion batteries, SiO x has been slow to commercialize due to its low initial Coulombic efficiency (ICE) and unstable solid electrolyte interface (SEI) layer, which leads to reduced full-cell energy density, short cycling lives, and poor rate performance. Herein, a novel strategy is proposed to in situ construct an artificial hybrid SEI layer consisting of LiF and Li 3 Sb on a prelithiated SiO x anode via spontaneous chemical reaction with SbF 3 . In addition to the increasing ICE (94.5%), the preformed artificial SEI layer with long-term cycle stability and enhanced Li + transport capability enables a remarkable improvement in capacity retention and rate capability for modified SiO x . Furthermore, the full cell using Li(Ni 0.8 Co 0.1 Mn 0.1 )O 2 and a pre-treated anode exhibits high ICE (86.0%) and capacity retention (86.6%) after 100 cycles at 0.5 C. This study provides a fresh insight into how to obtain stable interface on a prelithiated SiO x anode for high energy and long lifespan lithium-ion batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
界面化学
·
纳米材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fei Dou,Yuehua Weng,Guorong Chen,Liyi Shi,Hongjiang Liu,Dengsong Zhang
In this work, novel SiO x anode materials with low volume expansion and high ionic/electrical conductivity are designed by combining internal buffer space and external super thick TiO 2 /C hybrid shell of 200–400 nm. An electrochemical reaction visualizing confocal system is originally developed for characterizing electrode thickness changes, and the real-time quantitative change of electrode thickness during charging and discharging is realized. Surprisingly, the maximum thickness expansion of designed anodes with the specific capacity of 1006.2 mA h g −1 is only 37% in the first lithiation process. Subsequently, the designed anodes present stable cycle life of the capacity attenuation of 7.83% after 100 cycles compared with the capacity of 5 th cycle. It demonstrates that the designed thick TiO 2 /C hybrid coatings effectively swing the expansion stress of micro-sized SiO x to internal space. This work proves that the huge volume expansion of micro-sized SiO x particles can be controlled by reasonable design of surface hybrid coatings and bulk structure, and the long lifespan can be maintained. This strategy paves a way for the development of micro-sized SiO x anode materials with long cycle life and good process ability for high energy density lithium-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2019
·Vol. 28
·期 2
·173-182
·
IF 1.707
Huang Chongxing,Dang Xiujie,Bei Ronghua,Zhao Yuan,Li Cuicui,Chen Qiang,Wang Shuangfei
Polyethylene terephthalate (PET) is widely used in food packaging, but the processing aids that include materials such as plasticizers and antioxidants may migrate to food, thereby harming the food quality and human health. To develop packaging materials with lesser plasticizer migration and to understand the anti-migration mechanism, a SiO x layer was deposited by plasma-enhanced chemical vapor deposition (PECVD) on a PET substrate to prepare a composite film. The effects of SiO x layers with different thicknesses on blocking the migration of dioctyl phthalate (DEHP, a plasticizer) and Irganox 1010 (an antioxidant) from the PET substrate into the food simulant were investigated at three temperatures. The migration of additives from both pristine and SiO x -coated films increased with an increase in the contact time and temperature. However, compared with the pristine film, the specific migration rates of DEHP can be reduced by up to 88.57% in the 320-nm SiO x /PET composite film, while that of Irganox 1010 can reach 82.61%. For a fixed SiO x layer thickness, the DEHP migration is not greatly affected by temperature, while that of Irganox 1010 migration decreased at higher temperatures. In addition, a 320-nm SiO x layer effectively retarded the transmission of water vapor and oxygen through the composite film to 77.3% and 79.3% lesser than those of the pristine PET film, respectively. The SEM image showed that the surface of the composite film was denser and more uniform than a pristine PET film, which also confirmed that the SiO x layer can block the migration of additives.
研究领域:
材料科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 24
·4552
·
IF 3.06
Yingjie Zhu,Dong Li,Tarun Belwal,Li Li,Hangjun Chen,Tingqiao Xu,Zisheng Luo
A novel nano-silicon oxides (SiOx)/chitosan complex film was prepared using ultrasonic assistant in the process of dissolving chitosan and silicon oxides (SiOx), and characterized by transmission electron microscopy. Its effect on quality preservation of tomatoes (Solanum lycopersicumL. cv. Zheza 205) was investigated under ambient temperature. The results revealed that the nano-SiOx/chitosan complex (NSCC) film retarded weight loss and softness, delayed the titratable acids and total soluble solids loss, and thus markedly extended shelf life of green tomatoes. The antimicrobial activity of tomatoes coated with NSCC film was also recorded higher compared to chitosan (Ch) films and control. In addition, the NSCC film-coated tomatoes prevent the increase of malondialdehyde content and total polyphenol content. Moreover, the peroxidase activity, phenylalanine ammonia-lyase activity, and polyphenoloxidase activity of tomatoes coated with NSCC film were found lower than that in other treatments. These data indicated that the beneficial effects of nano-SiOx/chitosan complex coating on postharvest quality were possibly associated with the lower rate of O2/CO2transmission coefficient, limiting food-borne pathogenic bacterial growth, higher antioxidant activities, and also higher reactive oxygen species (ROS) scavenging and anti-browning activities of related enzymes in the tomatoes. Further, the results of the study could be used to successfully develop a novel nano-SiOx/chitosan complex film for improving the postharvested quality of tomatoes and thus effectively utilized by the food packaging industry.Keywords:nano-SiOx/chitosan complex coating;green tomato;postharvest quality;microbial load;enzyme activities
研究领域:
食品科学
·
植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2023
·
IF 17.1
Ruohan Yu,Yexin Pan,Yihang Liu,Liang Zhou,Dongyuan Zhao,Jinsong Wu,Liqiang Mai
TiO2 has been considered as a promising intercalation lithium-ion-battery (LIB) anode material owing to its robust cyclability. However, it suffers from low capacity. Herein, we construct a sub 10 nm scale interfused TiO2/SiOx hybrid with a bicontinuous structure, in which bridged TiO2 nanoparticles (over 80 wt %) are densely packed within a wormlike SiOx network, through the simple oxidation of MAX Ti3SiC2 ceramic. State-of-the-art in situ microscopy characterization unravels a “mutual-stabilizing” effect from the interfused TiO2/SiOx hybrid upon lithiation. That is to say, the two interpenetrated active components restrain the volume expansion of each other with the stress being relieved through abundant interfaces. Meanwhile, the stress generated from one phase functioned as the compressive force on the other phase and vice versa, offsetting the overall volume effect and synergistically reinforcing the structure integrity. Benefiting from the “mutual-stabilizing” effect, the TiO2/SiOx composite manifests a high and stable specific capacity (∼671 mAh g–1 after 580 cycles at 0.1 A g–1) with a low volume expansion of ∼14% even in an extended potential window of 0.01–3.0 V (vs Li+/Li). The concept of mutual-stabilizing effect, in principle, applies to a wide class of interfused bicontinuous hybrids, providing insight into the design of LIB anode materials with high capacity and longevity.
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
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zongwei Tong,Baojie Zhang,Huijun Yu,Xiangjie Yan,Hui Xu,Xiaolei Li,Huiming Ji
Nanofibrous aerogels constructed by ceramic fiber components (CNFAs) feature lightweight, compressibility, and high-temperature resistance, which are superior to brittle ceramic aerogels assembled from nanoparticles. Up to now, in order to obtain CNFAs with stable framework and multifunctionality such as hydrophobicity and gas absorption, it is necessary to perform binding and surface modification processes, respectively. However, the microstructure as well as properties of CNFAs are deteriorated by the direct addition of binders and modifiers. To tackle these problems, we introduced a unique low-temperature (100 °C) chemical vapor deposition method (LTCVD) to achieve the cross-linking and hydrophobization of Si3N4 CNFA in only one step. More importantly, during the LTCVD process, SiOx coatings and nanowire arrays were in situ formed via vapor–solid (VS) and vapor–liquid–solid (VLS) mechanisms on the surface and intersection of Si3N4 nanofibers, which cemented the aerogel framework, endowed it with hydrophobicity, and improved its oxidation resistance at high temperature. Compared to most of its counterparts, the Si3N4/SiOx CNFA exhibited better mechanical properties, higher capability of oil/water separation (33–76 g·g–1), lower thermal conductivity (0.0157 W/m·K–1), and superior structural stability in a wide temperature range of −196–1200 °C. This work not only presents an excellent Si3N4/SiOx CNFA for the first time but also provides fresh insights for the exquisite preparation strategy of CNFAs.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 306
·期 1
·2000525
·
IF 3.853
Chao Luo,Xiufen Wu,Tian Zhang,Shang-Sen Chi,Zhengying Liu,Jun Wang,Chaoyang Wang,Yonghong Deng
The large-scale application of Si-based anodes is impeded by their fast capacity decay, which is mainly attributed to the huge volume expansion upon cycling. The employment of functional binders is one efficient method to mitigate this issue. In this work, a four-armed polyacrylic acid (4A-PAA) homopolymer is explored as a remarkably effective binder for Si-based anodes. The 4A-PAA binder is prepared via an atom transfer radical polymerization, followed by ester hydrolysis. Compared to the conventional linear polyacrylic acid (PAA) binder, the 4A-PAA not only shows enhanced toughness due to its decreased molecular regularity and intramolecular hydrogen bond but also exhibits increased binding strength because of its multidimensional binding structure. As a result, the SiO x /graphite electrode using the 4A-PAA retains a capacity retention of 89.1% and a capacity of 558.1 mAh g −1 after 200 cycles at 0.16 A g −1 , which are superior to the PAA electrode, corresponding to 80.4% and 469.3 mAh g −1 , respectively. The improved performance is attributed to the employment of the 4A-PAA, which mitigates the volume change of the SiO x /graphite anode. This work not only offers a promising binder for Si-based anodes but also presents a universal solution for other anodes with high volume expansion during cycling.
研究领域:
材料科学
·
电化学
·
锂离子电池
·
高分子化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Wenjie He,Tengfei Zhang,Zhiwei Li,Jiangmin Jiang,Chenglong Chen,Nan Liu,Hui Dou,Xiao Gang Zhang
Currently, the practical application of SiO x still has a huge hindrance in the area of lithium ion battery, because it is unable to achieve an effective contact with surrounding conducting materials, resulting in failure to form lithium ion migration tunnels. In this work, we presented a facile method to synthesize the B-doped SiO x composite by adhering SiO x particles with MWCNT (multi-walled carbon nanotube) under the assistance of lithium metaborate (LiBO 2 ). LiBO 2 , as a sintering aid, not only can react with SiO x to form a compacted framework, but also build a three-dimensional (3D) conductive network for ions transportation. Furthermore, B-SiO x @CNT@LBO anode delivers a remarkable lithium storage performance in terms of long cycles and high rate capability. A full cell coupled with NCM622 cathode achieves a high energy density of 429.5 Wh kg −1 based on the total mass of cathode.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaozhong Zhou,Zhaoyi Qi,Yuyuan Jiang,Pengfei Yan,Juanxia Ding,Haiyan Wang,Hongkai Lu,Dongxu Liu,Kaifa Dong,Yougen Tang,Dongfei Sun,Ziqiang Lei
SiO x is regarded as a promising anode material for the next-generation lithium-ion batteries with high energy density. However, the reduplicative volume changes during cycling cause the pulverizations of Si, leading to decreased utilization of active Si component and poor cycling performance. Herein, a facile and scalable Fe-Cr decorating strategy is reported to boost the lithium storage of SiO x anode. Our comprehensive characterizations indicate that there are strong interactions between Fe-Cr and SiO x during a facile ball milling process. After cycling, Fe-Cr nanoparticles are dispersed in the in-situ formed lithium silicates and Li 2 O matrix, which can maintain superior conductivity of lithium ion and electron for the active components through point-to-point connections. This unique structure boosts the electrochemical de-alloying process of the low-valent Li x Si (0 ≤ x ≤ 2), and increases effective utilization of the active Si component during cycling, resulting in improvement of reversible capacity and cycling stability. This bm SiO x -FeCr electrode can deliver high reversible specific capacity (1370 m Ah g −1 at 200 mA g −1 ), good rate capability (653.8 m Ah g −1 at 2000 mA g −1 ), and superior cycling stability. This work provides a promising route for improving the utilization of active Si component and the structural stability of SiO x -based anodes.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
·
固态物理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoyuan Liu,Jian Cai,Peiqi Zhou,Lixin Li,Zhen Ma,Xiaoyang Zhao,Junmin Nan
Although SiO x can exhibit a higher specific energy than graphite material in lithium-ion batteries (LIBs), its mass commercial application still suffers from the performance degradation of SiO x anode caused by volume expansion. In this work, based on a biomimetic strategy and the unique double helix structure of xanthan gum (XG), sodium alginate (SA), XG and polyacrylic acid (PAA) are used to design and prepare a new water-based binder (N-SXP) to form a biomorphic polymer binder network in the SiO x anodes and effectively improve the cycling performance. It is indicated that the hydrogen and chemical bonding forces of N-SXP binder can form a solid multiple chain structure, and in particular, the supramolecular ion–dipole effect of each side chain is similar to that of a millipede's leg and can firmly adsorb the SiO x surface, and together with large hydroxyl groups form bonds between N-SXP and SiO x . After 600 cycles at 0.5C, the reversible capacity is 1105 mAh/g. Even after 300 cycles at 1C and 2C, a stable performance can still be obtained. In addition, 250 cycles at 40 °C 0.5C still provide 1101 mAh g -1 de-lithium specific capacity. The full battery capacity remains stable after 150 cycles at 200 mA g −1, and a rate capacity of 115 mAh g -1 can be kept at 3C. The quantitative calculations by molecular simulations yield the role of N-SXP in forming the hydrogen bonds on SiO x surfaces, and combining with the spectroscopic characterization results further elucidate the functional mechanism of N-SXP binder in the SiO x anode. This biomimetic binder network pathway derived from N-SXP not only enhances the performance of SiO x anode but also provides an idea for the development of new bonding candidates of silicon-based materials.
研究领域:
材料科学
·
电化学
·
仿生学
✓ 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
危险品化学品经营许可证（带存储）