Journal of Zhejiang University-SCIENCE A
·
2013
·Vol. 14
·期 7
·514-519
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IF 0.527
Qin Xue-ying,Wang Jing-lun,Tang Dao-ping,Mai Yong-jin,Zhang Ling-zhi
{3-[2-(2-methoxyethoxy) ethoxy]-propyl} triethoxysilane (TESM2) was synthesized and used as an electrolyte additive to improve the performances of lithium-ion batteries (LIBs). The electrochemical properties of the electrolyte (1 mol/L lithium hexafluorophosphate (LiPF 6 )/ethylene carbonate (EC):diethylene carbonate (DEC):dimethyl carbonate (DMC), 1:1:1) with different contents of TESM2 were characterized by ionic conductivity measurement, galvanostatic charge/discharge test of graphite/Li half cells, and electrochemical impedance spectroscopy. Both the cycling performances and C-rate capabilities of graphite/Li half cells were significantly improved with an optimized content of 15% TESM2 in the electrolyte. The graphite/Li half cell delivered a very high specific capacity of 370 mAh/g at 0.2C rate without any capacity loss for 60 cycles, and retained a capacity of 292 mAh/g at 2C rate. The solid electrolyte interphase (SEI) film on the surface of the graphite anode was investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), indicating that TESM2 was effectively involved in the formation of SEI film on the surface of graphite.
研究领域:
电化学
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能源材料
·
纳米材料
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表面科学
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功能材料
✓ 已验证
DOI
高影响因子
IONICS
·
2013
·Vol. 19
·期 8
·1099-1103
·
IF 1.674
Yong Tianqiao,Wang Jinglun,Mai Yongjin,Tang Daoping,Zhang Lingzhi
Allyl cyanide (AC) was investigated as a film-forming additive in propylene carbonate (PC)-based electrolytes for graphite anode in lithium-ion batteries. The film-forming behavior of AC was characterized with cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy. By adding 2 wt% AC in the electrolyte of 1 M LiPF 6 -PC/DMC (1:1, in vol), the exfoliation of graphite anode was effectively suppressed over cycling. Graphite/Li half-cell showed an initial coulombic efficiency of 75 % and a specific capacity of 300 mAh/g after 48 cycles. A possible reductive polymerization mechanism of AC on the surface of graphite was proposed.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
功能材料
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2019
·
IF 2.886
Songyi Han,Hong Zhang,Chaojun Fan,Weizhen Fan,Le Yu
Layered structure LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM) cathode has been considered as a higher energy density candidate, but the problems of high voltage cycling resistance hinders its further application. Herein, we report a Nitrile (-CN) group 1,4-Dicyanobutane (ADN) as a film forming additive. Linear sweep voltammetry (LSV) tests have shown that EC/EMC based electrolytes with ADN have higher oxidation potentials (>6.2 V vs. Li/Li + ). The LiNi 0.5 Co 0.2 Mn 0.3 O 2 /graphite full cells containing 0.5 wt% ADN showed significant high voltage cycling performance with a capacity retention of 85.2%, while the blank electrolyte after 120 high voltage cycles was 67.96%. This is attributed to the protective effect of SEI film prevents the further decomposition of electrolyte and transition metal ion dissolution, thus stabilizes the electrode-electrolyte interface. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) results also demonstrate less unwanted lithium compounds absorbed on the ADN-contained cathode corresponding to fewer side reaction.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
电极-电解质界面
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Huimin Li,Bin Wu,Zhimin Zhu,Chenyang Li,Zhihan Liu,Fuweng Zhang,Huidong Zheng,Longfei Yan
Ethylene sulfate (DTD) is a new type of solid electrolyte interphase (SEI) film-forming additive for lithium-ion batteries. DTD was typically synthesized in the industry by oxidation of ethylene sulfite (ES) with NaClO via a RuCl 3 -catalyzed reaction. However, this route generates significant amount of Cl-containing wastes, and the recovery of RuCl 3 is costly and technically challenging. Herein, we present a green and heterogeneous route for synthesizing DTD from ES, utilizing the Titanium Silicalite-1 (TS-1) and H 2 O 2 as catalysts and green oxidants, respectively. Our research reveals that the tetra-coordination framework of Ti in TS-1 serves as the main active site for the oxidation of ES, achieving a remarkable yield of DTD up to 92 % under optimized reaction conditions. Additionally, we developed a continuous green oxidation process for synthesizing DTD from ES, which is the first of its kind and has been successfully operated continuously for over 300 h. This work provides a cost-effective, green, and efficient route for synthesizing DTD from ES.
研究领域:
绿色化学
·
催化化学
·
材料科学
·
化学工程
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Chong Xu,Shuang Liu,Sai Che,Guang Ma,Gong Cheng,Dongyuan Zhang,Junjie Fu,Ye Wang,Jiahao Yang,Yuci Tian,Yongpeng Cui,Weihua Chen,Yongfeng Li
Incorporating lithium nitrate (LiNO3) as a film-forming additive into carbonate-based electrolytes presents a promising strategy to enhance the stability of high-energy-density Li||NCM811 batteries. However, the small size of Li+ and the high donor number (DN) of NO3– hinder the dissociation of LiNO3, and its limited solubility (<800 ppm) in carbonate-based electrolytes poses significant challenges for practical application. To address this issue, we propose a “Small-Sized Carrier” strategy that enhances the solubility of LiNO3 in carbonate solvents by modulating the intermolecular interactions within the solvent system. This approach employs vinylene carbonate (VC), a small molecule with moderate polarity, to enhance the dissolution of LiNO3 without compromising the compatibility of the electrolyte with the lithium metal anode. The introduction of the “Small-Sized Carrier” additive system simultaneously enhances the stability of the electrode–electrolyte interfaces and optimizes the solvation structure of the electrolyte. As a result, the electrolyte developed through this strategy demonstrates outstanding electrochemical performance, with Li||NCM811 batteries achieving a capacity retention of 83.8% after 600 cycles. This work provides an insightful approach to designing advanced electrolytes tailored to high-energy-density lithium metal batteries (LMBs).
研究领域:
电化学
·
储能材料
·
电池技术
·
材料科学
·
化学工程
✓ 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）