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Electrochemical and thermodynamic st...

Bang, Hyun Joo.

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Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries./
作者:	Bang, Hyun Joo.
面頁冊數:	102 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5073.
Contained By:	Dissertation Abstracts International64-10B.
標題:	Engineering, Chemical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3108647

Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries.
Bang, Hyun Joo.

Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries. - 102 p.

Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5073.

Thesis (Ph.D.)--Illinois Institute of Technology, 2003.

A series of graphite samples were tested for their electrochemical performance as anode material for lithium ion cells. Specially treated natural graphite samples showed good reversible capacities and relatively small irreversible capacity losses. The good performance of these samples can be explained by the low surface area associated with the rounded edges and absence of exfoliation due to the presence of the rhombohedral phase and defects in the grain boundaries. Graphitized cokes showed larger irreversible capacity losses while mesophase carbons showed lower reversible capacity. The treated natural graphite samples, especially LBG25 were found to be high performance, low cost anode materials for the lithium ion cells.Subjects--Topical Terms:

1018531
Engineering, Chemical.

Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries.
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035 $a (UnM)AAI3108647
035 $a AAI3108647
040 $a UnM $c UnM
100 1 $a Bang, Hyun Joo. $3 1953534
245 1 0 $a Electrochemical and thermodynamic studies of the electrode materials for lithium ion batteries.
300 $a 102 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 5073.
500 $a Adviser: Jai Prakash.
502 $a Thesis (Ph.D.)--Illinois Institute of Technology, 2003.
520 $a A series of graphite samples were tested for their electrochemical performance as anode material for lithium ion cells. Specially treated natural graphite samples showed good reversible capacities and relatively small irreversible capacity losses. The good performance of these samples can be explained by the low surface area associated with the rounded edges and absence of exfoliation due to the presence of the rhombohedral phase and defects in the grain boundaries. Graphitized cokes showed larger irreversible capacity losses while mesophase carbons showed lower reversible capacity. The treated natural graphite samples, especially LBG25 were found to be high performance, low cost anode materials for the lithium ion cells.
520 $a The electrochemical and thermal behaviors of the spinels---LiMn 2O4, LiCo1/6Mn11/6O4, LiFe 1/6Mn11/6O4, and LiNi1/6Mn11/6 O4 were studied using electrochemical and thermochemical techniques. The electrochemical techniques included cyclic voltammetry, charge/discharge cycling of 2016 coin cells and diffusion coefficient measurements using Galvanostatic Intermittent Titration Technique. Better capacity retention(GITT) was observed for the substituted spinels (0.11% loss/cycle for LiCo1/6Mn 11/6O4; 0.3% loss/cycle for LiFe1/6Mn11/6 O4; and 0.2% loss/cycle for LiNi1/6Mn11/6 O4) than for the lithium manganese dioxide spinel (1.6% loss/cycle for first 10 cycles, 0.9% loss/cycle for 33 cycles) during 33 cycles. The Differential Scanning Calorimetry (DSC) results showed that the cobalt substituted spinel has better thermal stability than the lithium manganese oxide and other substituted spinels.
520 $a The thermal profile of LiMn2O4 and LiAl0.17 Mn1.83O3.97S0.03 was measured in an isothermal micro-calorimeter. The heat contributions are discussed in terms of reversible and irreversible heat generation, in combination with the entropy change directly obtained by the dE/dT measurements and the over-potential measurements. The endothermic and exothermic heat profiles observed during the charge and discharge processes are related to the Li insertion/extraction reaction in the spinel host structure for both materials. The reversible heat generation due to the lithium insertion/extraction reaction in the host electrode is estimated on the basis of the cell entropy change. The heat generation calculated from DeltaS and the open circuit potential results is consistent with the heat profile (exothermic/endothermic) generated during the charge/discharge process and with the magnitude of the heat generation from the experimental results obtained from the IMC at a slow charge/discharge rate. The irreversible heat generation dependence on the current rate is discussed at different discharge rates.
590 $a School code: 0091.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0542
690 $a 0488
690 $a 0794
710 2 0 $a Illinois Institute of Technology. $3 1018749
773 0 $t Dissertation Abstracts International $g 64-10B.
790 1 0 $a Prakash, Jai, $e advisor
790 $a 0091
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3108647