Ultralong storage life of Li/MnO2 primary batteries using MnO2-(CFx)n with C–F semi-ionic bond as cathode materials
Article
Chang, Yali, Wang, Min, Wang, Shengping, Na, Jongbeom, Bund, Andreas, Nanjundan, Ashok Kumar and Yamauchi, Yusuke. 2019. "Ultralong storage life of Li/MnO2 primary batteries using MnO2-(CFx)n with C–F semi-ionic bond as cathode materials." Electrochimica Acta. 320. https://doi.org/10.1016/j.electacta.2019.134618
Article Title | Ultralong storage life of Li/MnO2 primary batteries using MnO2-(CFx)n with C–F semi-ionic bond as cathode materials |
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ERA Journal ID | 1629 |
Article Category | Article |
Authors | Chang, Yali, Wang, Min, Wang, Shengping, Na, Jongbeom, Bund, Andreas, Nanjundan, Ashok Kumar and Yamauchi, Yusuke |
Journal Title | Electrochimica Acta |
Journal Citation | 320 |
Article Number | 134618 |
Number of Pages | 9 |
Year | 2019 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0013-4686 |
1873-3859 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.electacta.2019.134618 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0013468619314665 |
Abstract | The theoretical self-discharge rate of Li/MnO2 primary batteries is less than 1% per year, but the actual self-discharge rate is ∼8% per year, and the shelf life of the coin batteries (such as CR2016) is only 5 years. In this paper, MnO2 mixed some (CFx)n as cathode material in Li/MnO2 primary batteries, not only can effectively reduce self-discharge rate, but also improve capacity density and heighten discharge plateau voltageafter storage. After storage at 25 °C for 60 days, the specific charge capacity of MnO2 decreases from 293 mAh g−1 to 283 mAh g−1, while MnO2-(CFx)n increases from 312 mAh g−1 to 326 mAh g−1. After storage for 30 days at 45 °C, the self-discharge rates of MnO2 and MnO2-(CFx)n are 9.21% and 1.92% (0.5 mA cm−2), respectively. During storage and the initial stage of discharge, F in MnO2-(CFx)n can act on Mn–O bond and some C–F semi-ionic bonds form when Li+ insert into (CFx)n layers, these change the unit cell parameters of MnO2 and the utilization of MnO2 increases. |
Keywords | C–F semi-ionic bond; Lithium manganese dioxide primary battery; Storage performance; Graphite fluoride |
ANZSRC Field of Research 2020 | 340604. Electrochemistry |
400404. Electrochemical energy storage and conversion | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | China University of Geosciences, China |
University of Queensland | |
Ilmenau University of Technology, Germany | |
National Institute for Materials Science, Japan |
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