In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode
For the use of the zinc anode in secondary batteries, it is necessary to solve the “shape change” deterioration issue in that zinc species agglomerate in the center of the electrode to fade the available capacity. The local chemical compositions of the zinc electrodes during “shape change” were prec...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-04-01
|
| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.5011272 |
| _version_ | 1819207979926290432 |
|---|---|
| author | Akiyoshi Nakata Hajime Arai Haruno Murayama Katsutoshi Fukuda Tomokazu Yamane Toshiro Hirai Yoshiharu Uchimoto Jun-ichi Yamaki Zempachi Ogumi |
| author_facet | Akiyoshi Nakata Hajime Arai Haruno Murayama Katsutoshi Fukuda Tomokazu Yamane Toshiro Hirai Yoshiharu Uchimoto Jun-ichi Yamaki Zempachi Ogumi |
| author_sort | Akiyoshi Nakata |
| collection | DOAJ |
| description | For the use of the zinc anode in secondary batteries, it is necessary to solve the “shape change” deterioration issue in that zinc species agglomerate in the center of the electrode to fade the available capacity. The local chemical compositions of the zinc electrodes during “shape change” were precisely analyzed using the synchrotron X-ray diffraction mapping analysis of practical zinc-nickel cells in a non-destructive manner. The in situ Zn/ZnO mapping shows that metallic Zn deposition chiefly occurs in the periphery of ZnO while ZnO are left in the center of electrode like a hill on charging. On discharging, the ZnO hill grows to the perpendicular direction on the electrode while metallic zinc is oxidized and dissolved. These findings allow us to propose a mechanism for the shape change; thus dissolved zincate species are decomposed on the ZnO hill during discharging to be accumulated in the center of the electrode. It is suggested that suppressing zincate dissolution and non-uniform zinc deposition slow the growth rate of the ZnO hill to enhance the cyclability of zinc-based secondary batteries. |
| first_indexed | 2024-12-23T05:32:06Z |
| format | Article |
| id | doaj.art-42ec03bd59d64d33803d2d931c8bc1f3 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-23T05:32:06Z |
| publishDate | 2018-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-42ec03bd59d64d33803d2d931c8bc1f32022-12-21T17:58:26ZengAIP Publishing LLCAPL Materials2166-532X2018-04-0164047703047703-610.1063/1.5011272003899APMIn situ Zn/ZnO mapping elucidating for “shape change” of zinc electrodeAkiyoshi Nakata0Hajime Arai1Haruno Murayama2Katsutoshi Fukuda3Tomokazu Yamane4Toshiro Hirai5Yoshiharu Uchimoto6Jun-ichi Yamaki7Zempachi Ogumi8Office of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanGraduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanOffice of Society-Academia Collaboration for Innovation, Kyoto University, Gokasho, Uji 611-0011, JapanFor the use of the zinc anode in secondary batteries, it is necessary to solve the “shape change” deterioration issue in that zinc species agglomerate in the center of the electrode to fade the available capacity. The local chemical compositions of the zinc electrodes during “shape change” were precisely analyzed using the synchrotron X-ray diffraction mapping analysis of practical zinc-nickel cells in a non-destructive manner. The in situ Zn/ZnO mapping shows that metallic Zn deposition chiefly occurs in the periphery of ZnO while ZnO are left in the center of electrode like a hill on charging. On discharging, the ZnO hill grows to the perpendicular direction on the electrode while metallic zinc is oxidized and dissolved. These findings allow us to propose a mechanism for the shape change; thus dissolved zincate species are decomposed on the ZnO hill during discharging to be accumulated in the center of the electrode. It is suggested that suppressing zincate dissolution and non-uniform zinc deposition slow the growth rate of the ZnO hill to enhance the cyclability of zinc-based secondary batteries.http://dx.doi.org/10.1063/1.5011272 |
| spellingShingle | Akiyoshi Nakata Hajime Arai Haruno Murayama Katsutoshi Fukuda Tomokazu Yamane Toshiro Hirai Yoshiharu Uchimoto Jun-ichi Yamaki Zempachi Ogumi In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode APL Materials |
| title | In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode |
| title_full | In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode |
| title_fullStr | In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode |
| title_full_unstemmed | In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode |
| title_short | In situ Zn/ZnO mapping elucidating for “shape change” of zinc electrode |
| title_sort | in situ zn zno mapping elucidating for shape change of zinc electrode |
| url | http://dx.doi.org/10.1063/1.5011272 |
| work_keys_str_mv | AT akiyoshinakata insituznznomappingelucidatingforshapechangeofzincelectrode AT hajimearai insituznznomappingelucidatingforshapechangeofzincelectrode AT harunomurayama insituznznomappingelucidatingforshapechangeofzincelectrode AT katsutoshifukuda insituznznomappingelucidatingforshapechangeofzincelectrode AT tomokazuyamane insituznznomappingelucidatingforshapechangeofzincelectrode AT toshirohirai insituznznomappingelucidatingforshapechangeofzincelectrode AT yoshiharuuchimoto insituznznomappingelucidatingforshapechangeofzincelectrode AT junichiyamaki insituznznomappingelucidatingforshapechangeofzincelectrode AT zempachiogumi insituznznomappingelucidatingforshapechangeofzincelectrode |