High-Performance Ag-Doped Na0.67MnO2 Cathode: Operando XRD Study and Full-Cell Performance Analysis with Presodiated Anode
Source abstract
Abstract
The key challenges of Na-ion batteries are to design structurally stable electrodes and reach high-enough capacities with full-cells. In this study, we report the positive effects of Ag substitution/addition to Na 0.67 MnO 2 . We determined that some of the intended Ag was incorporated into the structure, while the rest remained in metallic form. Ag substitution/addition increases the capacity (208 mA h/g at C/3 rate) and improves the cycle life of Na 0.67 MnO 2 (42% capacity fade with 100 cycles) in half-cells. We attribute these results to an enlarged interlayer spacing due to the large ionic radius of Ag, a suppressed Jahn–Teller effect due to the reduced number of Mn 3+ ions, and an increased electrical conductivity due to the presence of metallic Ag. We also produced full-cells with an electrochemically presodiated hard carbon anode. We reached a very high initial capacity of 190 mA h/g at the C/3 rate, showing that Ag substituted/added Na 0.67 MnO 2 is a promising candidate for commercialization of Na-ion batteries.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Material Science and Engineering, Afyon Kocatepe University, 03200 Afyon, Turkiye
Physics Department, Inonu University, 44280 Malatya, Turkiye
Vocational School of Health Service, Inonu University, Battalgazi, 44280 Malatya, Turkiye
Energy Storage Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, 02792 Seoul, Republic of Korea
Nanoscience & Technology Department, National Centre for Physics, 45320 Islamabad, Pakistan
Center of Science and Technology Application and Research, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkiye
Petroleum and Natural Gas Engineering Department, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkiye
Department of Engineering Physics, Istanbul Medeniyet University, 34700 Istanbul, Turkiye
Funding
In?n? ?niversitesi
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