JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Yunyun Ding,Panpan Li,Jiashuang Wang,Xian Li,Yun Liu,Hongcun Bai,Hui Zhang
Si has become the most promising anode materials for lithium-ion batteries (LIBs) due to its high theoretical specific capacity and comparable low discharge potential. However, the practical usage of Si is still hindered by its huge volume expansion. To release volume stress and improve conductance, designed self-supporting binder-free Si electrode endowed with three-dimensional structure has been come up in this research. The pore structure is adjusted by rationally designing the proportion of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) to alleviate volume change. Simultaneously, construct stable conductivity network was fabricated via ice crystal self-assemble freezing technique following compress and carbonization process. The electrochemical specific capacity of rGO@CNTs@CNFs@Si-2 electrode has stably remained at 2250 mAh/g after 100 cycles (100 mA/g) with benign rate capabilities. This simple self-assemble method for self-supporting binder-free Si electrode would open a new route to exploit high energy density Si-based electrode for flexible LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Xuejing Chen,Qinghua He,Tian Guan,Yonghong He,Guangxia Feng,Bei Wang,Bangrong Lu,Yanhong Ji
Aiming to satisfy the growing requirements of high-throughput multiplexed bioassays, a dual-digital encoded suspension array (SA) analysis based on Raman spectroscopy and laser induced breakdown spectroscopy (LIBS) is proposed. The SAs are prepared by the core-shell microbeads with Raman reporter molecules doped inside and elementary encoded nanoparticles (EENPs) assembled on the surface. Raman scattering spectra and LIBS spectra are obtained after excitation by laser, the specific peaks from the spectra are used for decoding. Highly sensitive and selective recognition of dual-digital encoded SA are realized by immunoassay experiments with a detection limit of 9.17 pM. Owing to the narrow bandwidths and unchangeable read-out wavelengths, the above two types of spectra provide high accuracy and stability for encoding. Meanwhile, Raman and LIBS spectra are independent from fluorescence, thus the cross talk between the encoding signal and fluorescent label on analytes can be avoided. Moreover, since the coding number grows exponentially along with the increase of types of encoding materials, the combination of two channels promote a considerable rise in detection throughput. All the above properties demonstrate the unique potential of dual-digital encoded SA in high-throughput biological detection.
研究领域:
生物技术
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分析化学
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生物传感器
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光谱学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2019
·Vol. 7
·期 34
·19862-19871
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IF 10.733
Qingfeng Fu,Renjie Li,Xiangzhen Zhu,Guisheng Liang,Lijie Luo,Yongjun Chen,Chunfu Lin,X. S. Zhao
Nb16W5O55 is considered as a promising anode material for lithium-ion batteries (LIBs) due to its high safety, good cyclability and high rate performance. However, it has not been practically used since it suffers from its limited capacity. Here, we demonstrate the design and synthesis of a tungsten-free and niobium-rich Al0.5Nb24.5O62 anode material having a very large theoretical capacity of 400 mA h g−1 and a stable shear ReO3 crystal structure. Both Al0.5Nb24.5O62 microsized particles (Al0.5Nb24.5O62-M) and porous microspheres (Al0.5Nb24.5O62-P) were successfully synthesized. In situ X-ray diffraction indicated the intercalated characteristic of Al0.5Nb24.5O62 and revealed the Li+ insertion into/extraction from its (010) crystallographic planes with high structural stability. Consequently, Al0.5Nb24.5O62-P exhibited a large practical capacity (321 mA h g−1 at 0.1C) and good cyclability (90.0% capacity retention after 500 cycles at 10C). In addition, Al0.5Nb24.5O62-P exhibited significant intercalation pseudocapacitive behavior (86.1% pseudocapacitive contribution at 1.1 mV s−1), high rate performance (192 mA h g−1 at 10C), high initial coulombic efficiency (94.9%) and safe working potential (∼1.68 V). Al0.5Nb24.5O62 also performed well in a LiNi0.5Mn1.5O4//Al0.5Nb24.5O62-P full cell. These research results indicate that Al0.5Nb24.5O62 is a practical anode material for high-energy, stable, fast-charging and safe LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Zilin Yue,Hong Lin,Xiu Fang,Ye Tian,Wenqian Yan,Jiayi Yao,Xiaohui Chen,Kaiqiang Wang
Rapid detection of marine fish freshness is of great importance, as aquatic products are susceptible to spoilage during storage. In this work, for the first time, the laser induced breakdown spectroscopy (LIBS) coupled with multivariable analysis was used for the rapid identification of the freshness of sea bass ( Lateolabrax japonicus ) without using of organic solvents. Results suggested that the principal component analysis (PCA) could accurately differentiate the sea bass samples stored for different days, and the three freshness grades (first-grade, second-grade, and spoilage) of sea bass were separately clustered together. The overall classification accuracy of partial least squares-discriminant analysis (PLS-DA) reached 91.50% ± 1.49% and 97.33% ± 1.90% for differentiating sea bass samples stored for different days, and authenticating different freshness grades, respectively. As storage period increased, the degradation of high-molecular-weight proteins and micromorphology changes were observed in fish muscles using SDS-PAGE and SEM, respectively. In addition, the laser energy absorbed by sea bass increased with the longer storage periods, as shown by the plasma temperature and plasma electron density. The present study demonstrated the capability of LIBS combined with chemometrics for the rapid and eco-friendly identification of marine fish freshness in the food supply chain.
研究领域:
食品科学
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分析化学
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光谱学
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海洋生物学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 1
·122-130
·
IF 3.175
Shi Wang,Hao Xu,Ailian Wang,Xu Liu,Jie Chen,Zhinan Wang,Di Feng,Qinghui Zeng,Liaoyun Zhang
An inorganic-polymeric hybrid all-solid-state electrolyte (SSE) composed of chemically modified nano-silica, linear poly(trifluoroethyl methacrylate)-co-poly(poly(ethylene glycol) methyl ether methacrylate copolymer (PTFEMA-co-PPEGMA or LCP) and lithium salt is prepared and used in lithium-ion batteries (LIBs) for the first time. Nano-silica is transformed to SiO 2 -SH via esterification reaction. Then, SiO 2 -PEGMA is synthesized through click chemistry of SiO 2 -SH and PEGMA. The compatibility of the nano-SiO 2 and the LCP can be effectively improved due to the excellent dispersibility of the chemically modified nano-SiO 2 in the polymer matrix. As a result, the hybrid SSE has good thermal stability, excellent film-forming ability. Furthermore, the hybrid SSE shows superior comprehensive electrochemical properties, which makes the corresponding LiFePO 4 /Li cells have good cycling performance (the discharge capacity reaches 144 mAh g −1 at 0.3 C) and rate capability (90 mAh g −1 is reached at 1 C). Thus, the hybrid electrolyte can be a powerful SSE for high-safety and high-performance LIBs.
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）