Journal article
Unveiling the structural integrity of tunnel-type Na0.44MnO2 cathode for sodium ion battery
Journal of materials chemistry. A, Materials for energy and sustainability, v 12(37), pp 25109-25116
24 Sep 2024
Abstract
Tunnel-type Na0.44MnO2 (tt-NMO) is a promising cathode for sodium ion battery having excellent structural stability, diffusion kinetics, and low cost. However, this cathode is reported to suffer from low initial charge capacity (e.g., <= 60 mA h g(-1)) due to the limited accessibility of sodium ion extraction (0.22-0.24 Na+ per formula unit) from the structure, which hinders the practical viability of this material in a full battery cell. In this study, we report a tailored tt-NMO structure, synthesized using a two-step facile and scalable process, with >95% yield. Our tt-NMO demonstrated a 1st charge capacity of 110 mA h g(-1), followed by a discharge capacity of 115 mA h g(-1) within the potential window of 4-1.7 V versus Na/Na+. The long-term cycling performance at 0.5C rate and 1C rate (1C = 120 mA h g(-1)) shows excellent structural integrity for over 400 cycles with >75% capacity retention. We show experimentally and support it with DFT (density functional theory) calculations that the unique microstructure of this tt-NMO, with modulated Na-O bond length and Na-O-Na bond angle, results in open channels along the c-axis in the ab plane, providing a wide pathway for ion diffusion. The Na+ migration barriers (E-m) along the two pathways of the c-tunnel are calculated to be within the threshold limit of Na+ migration energy barrier, which renders more sites electrochemically active, enabling the high 1st charge capacity. This novel study opens possibilities to use this unique tt-NMO as an efficient SIB (sodium ion battery) cathode by harnessing the modified structure.
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Details
- Title
- Unveiling the structural integrity of tunnel-type Na0.44MnO2 cathode for sodium ion battery
- Creators
- Sankalpita Chakrabarty - Bar-Ilan UniversityJaveed Ahmad Dar - Indian Institute of Science BangaloreAkanksha Joshi - Bar-Ilan UniversityArad Paperni - Bar-Ilan UniversitySarah Taragin - Bar-Ilan UniversityAnanya Maddegalla - Bar-Ilan UniversityGopalakrishnan Sai Gautam - Indian Inst Sci, Dept Mat Engn, Bengaluru 560012, IndiaAyan Mukherjee - Bar-Ilan UniversityMalachi Noked - Bar-Ilan University
- Publication Details
- Journal of materials chemistry. A, Materials for energy and sustainability, v 12(37), pp 25109-25116
- Publisher
- Royal Soc Chemistry
- Number of pages
- 8
- Grant note
- 207420 / JNF 207420 / Academy of Finland (AKA); Research Council of Finland 16489 / Israel-US Binational Industrial R&D Foundation (BIRD foundation) 2023-604 / US-Israel Binational Science Foundation (NSF-BSF); US-Israel Binational Science Foundation 223-11-066 / National Energy Center 1211/21 / Israel Science Foundation (ISF); Israel Science Foundation
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001296356300001
- Scopus ID
- 2-s2.0-85201885825
- Other Identifier
- 991022004765704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary