Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion
LiMn2O4 cathodes are prepared by a rapid microwave-induced solution combustion method. Their initial discharge capacity is significantly improved by introducing trace Ni. For example, the LiMn1.975Ni0.025O4 (LMNO-0.025) cathode releases an initial discharge capacity of 134.1 mAh g−1 at 1 C, even 144...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2020-11-01
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| Series: | Electrochemistry |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/88/6/88_20-00083/_pdf/-char/en |
| _version_ | 1797971019082760192 |
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| author | Ruifang CHEN BiXia WEN Changwei SU Wei BAI Junming GUO |
| author_facet | Ruifang CHEN BiXia WEN Changwei SU Wei BAI Junming GUO |
| author_sort | Ruifang CHEN |
| collection | DOAJ |
| description | LiMn2O4 cathodes are prepared by a rapid microwave-induced solution combustion method. Their initial discharge capacity is significantly improved by introducing trace Ni. For example, the LiMn1.975Ni0.025O4 (LMNO-0.025) cathode releases an initial discharge capacity of 134.1 mAh g−1 at 1 C, even 144.5 mAh g−1 at 0.5 C, which is far higher than of the pristine LiMn2O4 cathode (119.7 mAh g−1 at 1 C) and close to its theoretical capacity of 148.2 mAh g−1. After 1000 cycles, the capacity retention of the LMNO-0.025 sample reaches 56.53 % at 1 C, and it can be presented the higher capacity retentions of 66.79 % at 5 C and 66.89 % at 20 C. The robust structure stability proved by XRD, SEM and HRTEM data, and the good kinetics testified by CV and EIS data of the Ni-doped material are responsible to improve the high-rate capability and long cycle properties. |
| first_indexed | 2024-04-11T03:25:01Z |
| format | Article |
| id | doaj.art-b12d8d8e37cf4984b2457b3d6492b93d |
| institution | Directory Open Access Journal |
| issn | 2186-2451 |
| language | English |
| last_indexed | 2024-04-11T03:25:01Z |
| publishDate | 2020-11-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj.art-b12d8d8e37cf4984b2457b3d6492b93d2023-01-02T07:42:12ZengThe Electrochemical Society of JapanElectrochemistry2186-24512020-11-0188653253910.5796/electrochemistry.20-00083electrochemistrySignificant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution CombustionRuifang CHEN0BiXia WEN1Changwei SU2Wei BAI3Junming GUO4Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Yunnan Minzu UniversityKey Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Yunnan Minzu UniversityKey Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Yunnan Minzu UniversityKey Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Yunnan Minzu UniversityKey Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Yunnan Minzu UniversityLiMn2O4 cathodes are prepared by a rapid microwave-induced solution combustion method. Their initial discharge capacity is significantly improved by introducing trace Ni. For example, the LiMn1.975Ni0.025O4 (LMNO-0.025) cathode releases an initial discharge capacity of 134.1 mAh g−1 at 1 C, even 144.5 mAh g−1 at 0.5 C, which is far higher than of the pristine LiMn2O4 cathode (119.7 mAh g−1 at 1 C) and close to its theoretical capacity of 148.2 mAh g−1. After 1000 cycles, the capacity retention of the LMNO-0.025 sample reaches 56.53 % at 1 C, and it can be presented the higher capacity retentions of 66.79 % at 5 C and 66.89 % at 20 C. The robust structure stability proved by XRD, SEM and HRTEM data, and the good kinetics testified by CV and EIS data of the Ni-doped material are responsible to improve the high-rate capability and long cycle properties.https://www.jstage.jst.go.jp/article/electrochemistry/88/6/88_20-00083/_pdf/-char/enmicrowavelimn2o4lithium-ion batteryni-doping |
| spellingShingle | Ruifang CHEN BiXia WEN Changwei SU Wei BAI Junming GUO Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion Electrochemistry microwave limn2o4 lithium-ion battery ni-doping |
| title | Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion |
| title_full | Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion |
| title_fullStr | Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion |
| title_full_unstemmed | Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion |
| title_short | Significant Improvement of LiMn2O4 Cathode Capacity by Introducing Trace Ni During Rapid Microwave-induced Solution Combustion |
| title_sort | significant improvement of limn2o4 cathode capacity by introducing trace ni during rapid microwave induced solution combustion |
| topic | microwave limn2o4 lithium-ion battery ni-doping |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/88/6/88_20-00083/_pdf/-char/en |
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