A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries
We report a facile method to prepare a nanoarchitectured lithium manganate/graphene (LMO/G) hybrid as a positive electrode for Li-ion batteries. The Mn2O3/graphene hybrid is synthesized by exfoliation of graphene sheets and deposition of Mn2O3 in a one-step electrochemical process, which is followed...
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2012-07-01
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| Series: | Beilstein Journal of Nanotechnology |
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| Online Access: | https://doi.org/10.3762/bjnano.3.59 |
| _version_ | 1818478409176580096 |
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| author | Wenyu Zhang Yi Zeng Chen Xu Ni Xiao Yiben Gao Lain-Jong Li Xiaodong Chen Huey Hoon Hng Qingyu Yan |
| author_facet | Wenyu Zhang Yi Zeng Chen Xu Ni Xiao Yiben Gao Lain-Jong Li Xiaodong Chen Huey Hoon Hng Qingyu Yan |
| author_sort | Wenyu Zhang |
| collection | DOAJ |
| description | We report a facile method to prepare a nanoarchitectured lithium manganate/graphene (LMO/G) hybrid as a positive electrode for Li-ion batteries. The Mn2O3/graphene hybrid is synthesized by exfoliation of graphene sheets and deposition of Mn2O3 in a one-step electrochemical process, which is followed by lithiation in a molten salt reaction. There are several advantages of using the LMO/G as cathodes in Li-ion batteries: (1) the LMO/G electrode shows high specific capacities at high gravimetric current densities with excellent cycling stability, e.g., 84 mAh·g−1 during the 500th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C capacity rating) in the voltage window of 3–4.5 V; (2) the LMO/G hybrid can buffer the Jahn–Teller effect, which depicts excellent Li storage properties at high current densities within a wider voltage window of 2–4.5 V, e.g., 93 mAh·g−1 during the 300th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C). The wider operation voltage window can lead to increased theoretical capacity, e.g., 148 mAh·g−1 between 3 and 4.5 V and 296 mAh·g−1 between 2 and 4.5 V; (3) more importantly, it is found that the attachment of LMO onto graphene can help to reduce the dissolution of Mn2+ into the electrolyte, as indicated by the inductively coupled plasma (ICP) measurements, and which is mainly attributed to the large specific surface area of the graphene sheets. |
| first_indexed | 2024-12-10T09:47:44Z |
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| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-10T09:47:44Z |
| publishDate | 2012-07-01 |
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| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-52c9aecba99444a2b53c3ead2431bce12022-12-22T01:53:45ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862012-07-013151352310.3762/bjnano.3.592190-4286-3-59A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteriesWenyu Zhang0Yi Zeng1Chen Xu2Ni Xiao3Yiben Gao4Lain-Jong Li5Xiaodong Chen6Huey Hoon Hng7Qingyu Yan8School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, SingaporeResearch Center for Applied Sciences, Academia Sinica, Taipei 11529, TaiwanSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeWe report a facile method to prepare a nanoarchitectured lithium manganate/graphene (LMO/G) hybrid as a positive electrode for Li-ion batteries. The Mn2O3/graphene hybrid is synthesized by exfoliation of graphene sheets and deposition of Mn2O3 in a one-step electrochemical process, which is followed by lithiation in a molten salt reaction. There are several advantages of using the LMO/G as cathodes in Li-ion batteries: (1) the LMO/G electrode shows high specific capacities at high gravimetric current densities with excellent cycling stability, e.g., 84 mAh·g−1 during the 500th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C capacity rating) in the voltage window of 3–4.5 V; (2) the LMO/G hybrid can buffer the Jahn–Teller effect, which depicts excellent Li storage properties at high current densities within a wider voltage window of 2–4.5 V, e.g., 93 mAh·g−1 during the 300th cycle at a discharge current density of 5625 mA·g−1 (~38.01 C). The wider operation voltage window can lead to increased theoretical capacity, e.g., 148 mAh·g−1 between 3 and 4.5 V and 296 mAh·g−1 between 2 and 4.5 V; (3) more importantly, it is found that the attachment of LMO onto graphene can help to reduce the dissolution of Mn2+ into the electrolyte, as indicated by the inductively coupled plasma (ICP) measurements, and which is mainly attributed to the large specific surface area of the graphene sheets.https://doi.org/10.3762/bjnano.3.59cathodegrapheneLi-ion batterylithium manganate |
| spellingShingle | Wenyu Zhang Yi Zeng Chen Xu Ni Xiao Yiben Gao Lain-Jong Li Xiaodong Chen Huey Hoon Hng Qingyu Yan A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries Beilstein Journal of Nanotechnology cathode graphene Li-ion battery lithium manganate |
| title | A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries |
| title_full | A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries |
| title_fullStr | A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries |
| title_full_unstemmed | A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries |
| title_short | A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries |
| title_sort | facile approach to nanoarchitectured three dimensional graphene based li mn o composite as high power cathodes for li ion batteries |
| topic | cathode graphene Li-ion battery lithium manganate |
| url | https://doi.org/10.3762/bjnano.3.59 |
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