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Synthesis and characterization of no...

Brown, Jason Rogers.

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Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry./
作者:	Brown, Jason Rogers.
面頁冊數:	101 p.
附註:	Chair: M. David Curtis.
Contained By:	Dissertation Abstracts International63-10B.
標題:	Chemistry, Inorganic. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3068833
ISBN:	0493885048

Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry.
Brown, Jason Rogers.

Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry. - 101 p.

Chair: M. David Curtis.

Thesis (Ph.D.)--University of Michigan, 2002.

Lithium transition metal oxides, LiMO2, are the most promising positive electrode material for lithium ion batteries because of their high charge capacity (>150 mAh/g) and facile lithium ion diffusion in their lattice. A new synthetic method for preparation of stabilized LiMO2 has been developed as “<italic>Assisted Soft Chemistry</italic>.” Using this technique, the lithium in LiMO2 can be exchanged partially for zinc or gallium. Powder X-ray diffraction studies verify that zinc or gallium doped Li1−yZny/2MO2 and Li 1−yGay/3MO2, where ‘y’ equals 0.15 or 0.30 and ‘M’ is Co0.7Ni0.3, Co 0.3Ni0.7, or Ni have the same lamellar structure as their respective non-doped precursors, LiCo0.7Ni0.3O 2, LiCo0.3Ni0.7O2, and LiNiO2 . Observed electrical conductivities were determined by AC impedance spectroscopy and two point probe measurements and indicate marked electronic conductivity enhancement for the Zn substituted sample in the range of 1 to 2 orders of magnitude. Electrochemical charge/discharge profiles of the new cathode materials have shown reversible lithium insertion and extraction processes with charge capacity exceeding 150 mAh/g. The DSC analyses of the zinc-doped cathode materials show improved thermal stability of the new cathode materials when compared to non-doped commercial cathode materials.

ISBN: 0493885048Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry.
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245 1 0 $a Synthesis and characterization of novel lithium ion battery cathode materials produced via assisted soft chemistry.
300 $a 101 p.
500 $a Chair: M. David Curtis.
500 $a Source: Dissertation Abstracts International, Volume: 63-10, Section: B, page: 4669.
502 $a Thesis (Ph.D.)--University of Michigan, 2002.
520 $a Lithium transition metal oxides, LiMO2, are the most promising positive electrode material for lithium ion batteries because of their high charge capacity (>150 mAh/g) and facile lithium ion diffusion in their lattice. A new synthetic method for preparation of stabilized LiMO2 has been developed as “<italic>Assisted Soft Chemistry</italic>.” Using this technique, the lithium in LiMO2 can be exchanged partially for zinc or gallium. Powder X-ray diffraction studies verify that zinc or gallium doped Li1−yZny/2MO2 and Li 1−yGay/3MO2, where ‘y’ equals 0.15 or 0.30 and ‘M’ is Co0.7Ni0.3, Co 0.3Ni0.7, or Ni have the same lamellar structure as their respective non-doped precursors, LiCo0.7Ni0.3O 2, LiCo0.3Ni0.7O2, and LiNiO2 . Observed electrical conductivities were determined by AC impedance spectroscopy and two point probe measurements and indicate marked electronic conductivity enhancement for the Zn substituted sample in the range of 1 to 2 orders of magnitude. Electrochemical charge/discharge profiles of the new cathode materials have shown reversible lithium insertion and extraction processes with charge capacity exceeding 150 mAh/g. The DSC analyses of the zinc-doped cathode materials show improved thermal stability of the new cathode materials when compared to non-doped commercial cathode materials.
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