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Journal = Batteries
Section = Emerging Battery Systems

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14 pages, 2705 KB  
Article
Biomass Corn Cob-Derived Hard Carbons via Joule Heating for Sodium-Ion Storage
by Hao Li, Shuo Shi, Binghui Xu and Xiu-Song Zhao
Batteries 2026, 12(5), 169; https://doi.org/10.3390/batteries12050169 - 13 May 2026
Viewed by 238
Abstract
Hard carbon (HC) materials are widely recognized as one of the most promising anode candidates for sodium-ion batteries (SIBs). Biomass-derived HC materials particularly possess the advantages of abundant sources, low cost, and high sodium-ion (Na+) storage capacity. In this work, the [...] Read more.
Hard carbon (HC) materials are widely recognized as one of the most promising anode candidates for sodium-ion batteries (SIBs). Biomass-derived HC materials particularly possess the advantages of abundant sources, low cost, and high sodium-ion (Na+) storage capacity. In this work, the agricultural byproduct corn cob is employed as a raw material to prepare HC samples via a facile two-step approach of pre-carbonization and Joule heating treatment. Among the prepared HC samples, the CHC-1400 sample exhibits the optimal physiochemical properties. As a result, the corresponding CHC-1400 electrode not only delivers the highest initial reversible capacity of 263 mAh g−1 with a corresponding initial coulombic efficiency (ICE) of 72% at 0.2 C, but maintains a high capacity retention of 91% after 300 cycles. The Na+ storage mechanism for the HC samples has thus been revealed. This study introduces a novel, time-saving, and cost-effective protocol for synthesizing biomass-derived HC anode materials, which is of great significance to the advancement of SIBs. Full article
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11 pages, 3335 KB  
Article
Enhancing Performance of LiFePO4 Battery by Using a Novel Gel Composite Polymer Electrolyte
by Ke Wu, Naiqi Hu, Shuchan Wang, Zhiyuan Geng and Wenwen Deng
Batteries 2023, 9(1), 51; https://doi.org/10.3390/batteries9010051 - 11 Jan 2023
Cited by 6 | Viewed by 4755
Abstract
Composite polymer electrolyte (CPE) is expected to have great prospects in solid-state batteries. However, their application is impeded due to the poor interfacial compatibility between CPE and electrodes that result in sluggish ionic transformation, especially at low temperatures. Here, on the basis of [...] Read more.
Composite polymer electrolyte (CPE) is expected to have great prospects in solid-state batteries. However, their application is impeded due to the poor interfacial compatibility between CPE and electrodes that result in sluggish ionic transformation, especially at low temperatures. Here, on the basis of Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer electrolyte, gel composite polymer electrolyte (GCPE) with fast Li+ transport channel is prepared by in-situ polymerization with poly (ethylene glycol) methyl ether acrylate (PEGMEA) monomer and FEC as additive. Compared with CPE, GCPE increases the ionic conductivity by 10 times. It also achieves more uniform lithium precipitation and significantly inhibits the growth of lithium dendrites. The LFP/GCPE/Li battery has a capacity retention of over 99% at both room temperature and 0 °C after 100 cycles. In addition, the coulombic efficiency is above 99% during cycling. Our work provides a new technology to prepare GCPE with high ionic conductivity at both room temperature and low temperatures that has great potential in the application of solid-state lithium batteries. Full article
(This article belongs to the Special Issue Emerging Technologies for Secondary Batteries)
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