Article
Electrochemistry
Ming-Kuen Huang, Krishnan Shanmugam Anuratha, Yaoming Xiao, Yen-Pei Chen, Jeng-Yu Lin
Summary: This study investigates the use of hybrid methylsulfonyl methane-based DES electrolytes with the introduction of water and acetonitrile as co-solvents for symmetric supercapacitors. Through systematic optimization of the molar ratio, the hybrid DES electrolytes exhibit improved ionic conductivity and viscosity. The optimized electrolyte demonstrates excellent performance in terms of specific capacitance, energy density, and cycling stability, providing opportunities for the development of low-cost and high-voltage electrolytes for energy storage applications.
ELECTROCHIMICA ACTA
(2022)
Article
Agricultural Engineering
Wei Tang, Caoxing Huang, Zhengyu Tang, Yu-Cai He
Summary: An efficient deep eutectic solvent (DES), synthesized using cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG), was used to enhance enzymatic saccharification of rape straw (RS). The optimized pretreatment parameters showed that the DES selectively removed lignin and xylan while preserving cellulose. DES pretreatment resulted in an increased enzymatic hydrolysis efficiency of RS by 46.0% due to the removal of 62.2% lignin and 53.2% xylan. The study also revealed that DES pretreatment improved cellulosic accessibility, reduced lignin hydrophobicity and surface area, and caused migration of cellulosic crystalline structure, contributing to enhanced enzymatic hydrolysis efficiency. Overall, this study presented an emerging method for the effective fractionation and valorization of lignocellulosic biomass within biorefinery technology.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zitong Fei, Yongyou Su, Qi Meng, Peng Dong, Yingjie Zhang
Summary: Current recycling strategies for spent cathode materials rely on destructive reconstruction methods, but a sustainable improvement is urgently needed for low-carbon and short-range recycling. In this study, a deep eutectic solvent (BEU) consisting of ethylene glycol lithium, betaine, and urea was used to directly regenerate spent LiCoO2 materials. The BEU method restored the lack of original composition and defects in the lattice structure, achieving a capacity retention rate of 87.10% after 200 cycles. This provides a new platform for the use of various spent lithium cathode resources.
ENERGY STORAGE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Huadong Tian, Rongrong Cheng, Lele Zhang, QianQian Fang, Ping Ma, Yaohui Lv, Feng Wei
Summary: The zinc-ion hybrid supercapacitor constructed with a non-aqueous deep eutectic solvent electrolyte shows high capacity and energy density, providing significant insights for the development of zinc-based energy storage and other similar electrolytes.
Article
Chemistry, Physical
He Yang, Jijian Zhang, Jiale Yao, Danying Zuo, Jing Xu, Hongwei Zhang
Summary: This study develops a gel polymer electrolyte based on a ternary deep eutectic solvent with a low eutectic point, which shows excellent flexibility and satisfactory mechanical properties. The optimized electrolyte exhibits high ionic conductivity at low temperature and significantly improves the energy density and cycling stability of a ZIHS. The assembled flexible device demonstrates outstanding wide-temperature adaptability and tolerance to harsh conditions.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Environmental
Chia-Wei Lien, Balaraman Vedhanarayanan, Jian-Hong Chen, Jeng-Yu Lin, Hsiang-Hsi Tsai, Li-Dong Shao, Tsung-Wu Lin
Summary: In this study, a co-solvent-in-deep eutectic solvent system was developed by mixing water and acetonitrile with a typical DES electrolyte. The addition of co-solvents improved the conductivity and flame-retardant properties of the DES, leading to a wide electrochemical stability window. Furthermore, a hydrogel consisting of 1T-MoS2 and reduced graphene oxide was used as electrode materials for supercapacitors, demonstrating high energy density and capacitance retention after cycles.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Antai Zhu, Qinqin Xu, Jun Huang, Yue Li, Fazhi Zhang, Shangdong Qin, Shizhao Li, Chao Wan, Haibo Xie
Summary: This article presents a simplified method to fabricate gelatin into gel electrolytes using deep eutectic solvent. The resulting gel exhibits excellent mechanical properties, ionic conductivity, and high temperature performance, showing great potential for applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Tianqi Li, Shaoning Wang, Yuefeng Huang, Huimei Zhou, Lili Zhang, Zhiguo Wang
Summary: A novel rapid-synthesis method was proposed for constructing high-performance deep eutectic solvent (DES)-based gel for flexible quasi-solid-state supercapacitors. The gel was formed through the dynamic redox reaction between lignin and silver ions, triggering the polymerization of acrylic acid monomer (AA). The resulting composite gel exhibited high conductivity, remarkable adhesion strength, and excellent electrochemical performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Lindokuhle Manyoni, Bakusele Kabane, Gan G. Redhi
Summary: This study evaluated a deep eutectic solvent for separation by experimentally determining the activity coefficients of various organic solutes and water at different temperatures. The molar excess properties of the solvent and the selectivity and capacity values for separation problems were also determined. The results showed that the deep eutectic solvent can be used for separating azeotropes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Electrochemistry
Chaojie Chen, Zhiwei Li, Yinghong Xu, Haojie Liao, Langyuan Wu, Hui Dou, Xiaogang Zhang
Summary: In this study, a green, low-cost, and safe approach using urea-zinc chloride deep eutectic solvent (DES) to prepare polyacrylonitrile derived three-dimensional carbon nanosphere (D-PC) was proposed. The D-PC showed efficient acceleration of electrolyte ions migration and enhanced charge storage, leading to high specific capacitance and cycling stability in zinc-ion hybrid supercapacitors. Additionally, it exhibited promising energy/power density and areal capacitance, highlighting the potential of DESs in the design of functional carbons.
BATTERIES & SUPERCAPS
(2021)
Article
Biotechnology & Applied Microbiology
Rashmi Walvekar, Ricky Saputra, Mohammad Khalid, Mahesh Vaka, Nabisab Mujawar Mubarak, Swapnil Dharaskar
Summary: This study successfully synthesized ammonium-ethylene glycol-based ternary deep eutectic solvents (TDESs) and measured their thermophysical properties. The results showed that the TDESs exhibited superior properties compared to their constituent components. The viscosity, pH, and density decreased, while electrical conductivity increased with increasing temperature. These observations can be attributed to excitation phenomena and hydrogen bonding delocalization.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Hengwei Zhang, Xin Gao, Fei Yao, Yanqiu Xie, Hongyan Yue
Summary: In this study, flower-like MnV2O6·2H2O microspheres were controllably synthesized using a methanol and ethylene glycol assisted solvothermal method. The methanol solvent induced the assembly of recrystallized nanosheets into flower-like microspheres, while ethylene glycol effectively reduced the microsphere size through strong complexation. The resulting MnV2O6·2H2O microsphere electrode exhibited excellent charge capacity, rate capability, and electrochemical stability, with a superior energy density of 35.7 Wh·kg-1 at a power density of 571.7 W·kg-1 when assembled into a supercapacitor.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Ruth Dikki, Eda Cagli, Drace Penley, Metin Karayilan, Burcu Gurkan
Summary: Choline-based sorbents were developed for CO2 capture, and the impact of different molecular structures on regenerability was explored. Eutectic solvents were formed by mixing with ethylene glycol, enabling renewable regeneration. The study provides guidance for molecular design of eutectic sorbents.
CHEMICAL COMMUNICATIONS
(2023)
Article
Electrochemistry
Yan Zhang, Yafei Wang, Yangming Zhang, Jingxin Zhao, Yiyang Liu, Ying Guan, Yongjun Zhang
Summary: In this study, a novel and simple water-salt-in-deep eutectic solvent (WS-DES) strategy was developed to enhance the ionic conductivity, reduce the viscosity, and lower the freezing temperature of deep eutectic solvent (DES). The WS-DES electrolyte showed significantly improved performance compared to the initial DES in supercapacitor devices, with higher specific capacitance, better rate performance, lower IR voltage drop, and lower internal resistance. Furthermore, the WS-DES electrolyte demonstrated excellent electrochemical stability even at extreme conditions of -40 degrees C.
BATTERIES & SUPERCAPS
(2022)
Article
Energy & Fuels
Jijian Zhang, Jing Li, Danying Zuo, Jin Xu, Hongwei Zhang
Summary: By using a ternary deep eutectic solvent to prepare eutectogels, the problems of carbon-based supercapacitors, such as low operating potential window and energy density, can be addressed. The optimized eutectogels show high ionic conductivity and good stretchability and twistability, making the quasi-solid-state supercapacitors with eutectogels exhibit stable voltage window, high energy density, and excellent cycling stability.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Anh Tien Nguyen, Weldejewergis Gebrewahid Kidanu, Valentina Olegovna Mittova, Van Hoang Nguyen, Dinh Quan Nguyen, My Loan Phung Le, Irina Yakovlevna Mittova, Il Tae Kim, Tuan Loi Nguyen
Summary: A new hybrid HoFeO3-Ho2O3 nanocomposite perovskite composite was successfully synthesized as a stable and high-capacity anode material for lithium-ion batteries. The composite exhibited a stable reversible capacity and high coulombic efficiency, outperforming traditional Ho2O3 and Fe2O3 samples. This study provides new insights for utilizing perovskite-structured materials with superior electrochemical performance in advanced lithium-ion storage.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Minh Le Nguyen, Hoang Van Nguyen, Nitika Ghosh, Akhil Garg, Man Van Tran, Phung My Loan Le
Summary: Sodium-ion batteries (SIBs) are gaining interest in research as a post-Lithium-ion batteries (LIBs) option. This study synthesized and characterized the sodium storage properties of P2-NaxMn0.5Co0.5O2 (NMC55), demonstrating increased capacity, rate capability, and cycle stability. The addition of fluoroethylene carbonate (FEC) additive improved performance at high voltage, with interface chemical differences between FEC-free and FEC-content electrolytes revealed through Fourier transform infrared and electrochemical impedance spectroscopy.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Ngoc Thi Bao Nguyen, Hoang Van Nguyen, Nhan Thanh Tran, Phat Tan Vu, Phung My Loan Le, Man Van Tran
Summary: High voltage cathode materials LiNixMn2-xO4 have gained significant attention in the development of high energy density Li-ion batteries. The challenge lies in the electrolyte decomposition and cathode degradation during cycling. Sodium carboxymethyl cellulose and lithium polyacrylic acid were suggested as water-soluble binders to replace PVdF and showed improved cycling performance.
ELECTRONIC MATERIALS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
An L. Phan, Chamithri Jayawardana, Phung M. L. Le, Jiaxun Zhang, Bo Nan, Weiran Zhang, Brett L. Lucht, Singyuk Hou, Chunsheng Wang
Summary: The formation of lithiophobic inorganic solid electrolyte interphase (SEI) on Li anode and cathode electrolyte interphase (CEI) on the cathode is beneficial for high-voltage Li metal batteries. However, decomposition of organic solvents in most liquid electrolytes leads to the formation of organic components in the SEI and CEI. This poses safety risks due to their high volatility and flammability. An organic-solvent-free eutectic electrolyte based on low-melting alkali perfluorinated-sulfonimide salts is reported, which shows promising results for ultrasafe and high-energy Li metal batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ngoc Thi Bao Nguyen, Ni Truong Nhat Nguyen, Hoang Van Nguyen, Nhan Thanh Tran, Trung Thien Nguyen, Quan Dinh Nguyen, Quan Phung, Phung My Loan Le, Duc Quang Truong, Man Van Tran
Summary: In order to combat the rapid capacity fading issue of LMO, researchers focused on surface modifying LMO powder with ZnO and Al2O3 thin layers, which effectively reduced dissolution loss and distortion. Multiple additives in the electrolyte also improved the cycling performance. ZnO-coated and Al2O3-coated LMO exhibited good crystallinity and stable structure. The full cell with ZnO-coated LMO showed 86.69% capacity retention after 100 cycles. The formation of CEI and SEI layers contributed to the enhanced cycling performance.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Chemical
Le Minh Nguyen, Van Hoang Nguyen, Doan My Ngoc Nguyen, Minh Kha Le, Van Man Tran, My Loan Phung Le
Summary: This study investigates the effect of calcination temperature on the structure and electrochemical performance of NaxMn0.5Co0.5O2 (NMC) cathode material for Sodium-ion batteries (NIBs). The results show that higher calcination temperature improves the specific capacity and cycling stability. P2-NMC structure exhibits better sodium storage performance than P3-NMC structure. The synergic effect of the two phases facilitates sodium ion migration.
Article
Energy & Fuels
Minh Thu Nguyen, Thanh Liem Pham, Huynh Thi Kim Tuyen, Hue Ngan Dai, My Loan Phung Le
Summary: This article investigates the effects of two factors (carbon additive, N/P ratio) on the performance of Li-ion cells using LiFePO4 (LFP) synthesized via the hydrothermal method. The synthesized LFP material is found to be pure and within the single phase of the orthorhombic lattice. The electrochemical properties of the LFP cathode mixed with different carbon additives (C65 and CNTs) are studied, and their diffusion coefficients and rate capabilities are determined.
Article
Chemistry, Multidisciplinary
Khuong Quoc Vo, Man Van Tran, Thu Anh Nguyen, Anh-Thi Tran Cao, Sy Van Vu, Kha Ni Tran, Nguyen Thanh Si, Vu-Nhat Pham
Summary: In this study, a nanosubstrate for trace determination of sulfathiazole (STZ) was prepared using surface-enhanced Raman scattering (SERS) technique. The nanosubstrate, composed of spinous gold nanoparticles (SGNPs) with long tips, showed high sensitivity and good reproducibility. It could detect STZ at low concentrations and had an excellent linear correlation between concentration and intensity. The nanosubstrate has potential applications in measuring various antibiotics.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Electrochemistry
Xuan My Nguyen Thi, Kha Minh Le, Quan Phung, Duc Quang Truong, Hoang Van Nguyen, Quynh Nhu Nguyen, Tuyen Thi Kim Huynh, Liem Thanh Pham, Man Tran Van, Phung My Loan Le
Summary: This research focuses on comparing the effects of the direct contact method (CM) and the electrochemical method (EM) on SiO2/C anode. Prelithiation techniques can enhance the discharged capacity and Coulombic efficiency, thus improving the overall battery performance.
Article
Chemistry, Multidisciplinary
Minh Kha Le, Thanh Nhan Tran, Thi Kim Tuyen Huynh, Van Hoang Nguyen, Duy Thanh Vo, Van Man Tran, My Loan Phung Le
Summary: This study focuses on the effects of chemical treatment and heating time on the structure and electrochemical performance of anthracite coal. The results show that the interlayer spacing of graphene in anthracite increases after heat treatment, leading to enhanced intercalation ability of Na+ ions. The sample heated at 900 degrees C for 6 hours exhibits the highest reversible capacity and good capacity retention after cycling.