| 1. |
Sharma J., Krajewski M., Shekhar C.♦, Bochenek K., Zaszczyńska A., Coy E.♦, Jarek M.♦, Huang Z.♦, Jain A., Perchlorate-based poly(vinylidene fluoride-co-hexafluoropropylene) gel polymer electrolytes for high-voltage supercapacitors,
Materials Research Express, ISSN: 2053-1591, DOI: 10.1088/2053-1591/ae7e4e, Vol.13, No.125502, pp.1-17, 2026 Abstract:
This study explores the development of porous poly(vinylidene luoride-co-hexafluoropropylene) based gel polymer electrolytes (GPEs) via a general polyethylene glycol extraction method, fol-lowed by the incorporation of perchlorate salts (LiClO4, Mg(ClO4)2, NaClO4). The influence of cation valency and ionic radius on ionic transport was systematically investigated for high-voltage supercapacitors (SCs). Among the prepared electrolytes, the LiClO4 based GPE exhibits the high-est ionic conductivity of 7.4 × 10−3 S cm−1 at room temperature along with a stable electrochemi-cal window of 2.6 V and superior performance in symmetric SCs. Symmetric SCs assembled with activated carbon achieved a specific capacitance of 76.7 F g−1 and retained excellent cycling sta-bility of 96.9% after 10 000 consecutive charge-discharge cycles measured at a current density of 1 A g−1. This work highlights the enhanced performance of ion transport attributed to a well-interconnected porous structure at the electrode−electrolyte interface and provides insights into the role of chemistry in high-performance SCs. Keywords:
activated carbon, gel polymer electrolyte, ionic conductivity, supercapacitor, temperature dependence Affiliations:
| Sharma J. | - | IPPT PAN | | Krajewski M. | - | IPPT PAN | | Shekhar C. | - | other affiliation | | Bochenek K. | - | IPPT PAN | | Zaszczyńska A. | - | IPPT PAN | | Coy E. | - | other affiliation | | Jarek M. | - | other affiliation | | Huang Z. | - | Beijing University (CN) | | Jain A. | - | IPPT PAN |
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| 2. |
Krajewski M., Chen C.H.♦, Huang Z.T.♦, Lin J.Y.♦, Li4Ti5O12 Coated by Biomass-Derived Carbon Quantum Dots as Anode Material with Enhanced Electrochemical Performance for Lithium-Ion Batteries,
Energies, ISSN: 1996-1073, DOI: 10.3390/en15207715, Vol.15, No.20, pp.7715-1-13, 2022Abstract:
Li4Ti5O12 (LTO) is a promising anode material for lithium-ion batteries (LIBs) due to its stable reversibility, high-rate cyclability, and high operational potential. On the other hand, it suffers from poor electronic conductivity and low capacitance. To overcome these disadvantages, modification of the LTO surface is frequently undertaken. Considering this idea, the production of a biomass-derived carbon-coated LTO material (LTO/C) and its application as an anode in LIBs is described in this work. The carbon precursor was obtained from commercial carrot juice, which was degraded using microwaves. According to the UV studies, the carbon precursor revealed similar properties to carbon quantum dots. Then, it was deposited on LTO synthetized through a sol-gel method. The LTO/C electrode exhibited a high specific capacity of 211 mAhg−1 at 0.1 C. Capacity retention equal to 53% of the initial value was found for the charge–discharge rate increase from 0.1 C to 20 C. The excellent electrochemical performance of LTO/C was caused by the carbon coating, which provided (i) short diffusion pathways for the Li+ ions into the LTO structure and (ii) enhanced electronic conductivity. The obtained results indicated that biomass-derived carbon quantum dot-coated LTO can be considered as a promising anode for LIBs. Keywords:
anode material, biomass-derived carbon, carbon coating, carbon quantum dot, lithium-ion battery Affiliations:
| Krajewski M. | - | IPPT PAN | | Chen C.H. | - | other affiliation | | Huang Z.T. | - | Beijing University (CN) | | Lin J.Y. | - | Tunghai University (CN) |
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