Applications and Studies of Tin/Multi-Walled Carbon Nanotubes Composite as Anode Materials for High Capacity Lithium-ion Secondary Battery
Date Issued
2009
Date
2009
Author(s)
Lo, Wei
Abstract
Major goals of development of lithium-ion secondary batteries are elongated battery lifetime, excellent battery performance, and low cost manufacturing. In recent years, in respect of the development of high capacity anode materials, emphasis has been put in metal modification of graphite or carbonaceous surface in order to improve capacity and cycle life of the anode materials.his study aims to enhance the capacity of Sn/MWCNTs composite as an anode material. SEM and TEM examinations show that the nano-sized tin particles with spherical shape are randomly distributed outside and inside the net-like MWCNTs.he charge/discharge characteristics, cycle life performance, and electrochemical behaviors, are performed by continuous cycle cell charge/discharge tests, cycle life tests, and cyclic voltammetry tests, respectively. The electrochemical behavior of the nano-composite substantially elevates their performance as compared with Sn or MWCNTs. Particularly, the charge/discharge capacity of the Sn/MWCNTs composite anode, after RTA processing, is 948.4 mAh/g, which is far greater than the pristine one without RTA and is also markedly higher than unmodified MWCNTs or Tin. Besides, the rate capacity can be maintained 91.44% under 2C high discharge rate tests
Subjects
lithium-ion cells
anode material
continuous cycle charge/discharge
Type
thesis
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