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A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries
นักวิจัย : Zhang, Wenyu , Zeng, Yi , Xu, Chen , Xiao, Ni , Gao, Yiben , Li, Lain-Jong , Chen, Xiaodong , Hng, Huey Hoon , Yan, Qingyu
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Zhang, W., Zeng, Y., Xu, C., Xiao, N., Gao, Y., Li, L. J., Chen, X., Hng, H. H.,& Yan, Q. (2012). 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, 3, 513-523 , 2190-4286 , http://hdl.handle.net/10220/12674 , http://dx.doi.org/10.3762/bjnano.3.59
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Beilstein journal of nanotechnology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Zhang, Wenyu , Zeng, Yi , Xu, Chen , Xiao, Ni , Gao, Yiben , Li, Lain-Jong , Chen, Xiaodong , Hng, Huey Hoon , Yan, Qingyu . (2555). A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Wenyu , Zeng, Yi , Xu, Chen , Xiao, Ni , Gao, Yiben , Li, Lain-Jong , Chen, Xiaodong , Hng, Huey Hoon , Yan, Qingyu . 2555. "A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Wenyu , Zeng, Yi , Xu, Chen , Xiao, Ni , Gao, Yiben , Li, Lain-Jong , Chen, Xiaodong , Hng, Huey Hoon , Yan, Qingyu . "A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Zhang, Wenyu , Zeng, Yi , Xu, Chen , Xiao, Ni , Gao, Yiben , Li, Lain-Jong , Chen, Xiaodong , Hng, Huey Hoon , Yan, Qingyu . A facile approach to nanoarchitectured three-dimensional graphene-based Li–Mn–O composite as high-power cathodes for Li-ion batteries. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.