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Electrochemical characteristics of lithium metal anodes with diamond like carbon film coating layer
Arie, A.A.,Lee, J.K. Elsevier 2011 Diamond and related materials Vol.20 No.3
To overcome the poor electrochemical characteristics of lithium metal anodes due to the dendrite formations, diamond like carbon (DLC) films were deposited onto the surface of lithium metal by radio frequency-plasma enhanced chemical vapor deposition (CVD) technique using acetylene gas as carbon precursor. The substrate temperature was selected as the main experimental parameter to control the bonding characteristic (sp<SUP>2</SUP>/sp<SUP>3</SUP> ratio) of the films. The presence of diamond like structures was confirmed by Raman and Fourier transform infra red spectroscopy. The DLC coated lithium metal was then characterized as an anode material for lithium secondary batteries. The results showed that the DLC coated lithium metal anodes exhibited better electrochemical characteristics in terms of higher specific capacity and smaller interfacial impedance. These improved characteristics were attributed to the presence of DLC film coating which might suppress the dendrite's formation by protecting the lithium metal surface from the direct contact with the electrolyte.
Is Public-Private Partnerships (PPP) a Promising Strategy for Rural Development?
Arie Halachmi 연세대학교(미래캠퍼스) 빈곤문제국제개발연구원 2010 地域發展硏究 Vol.19 No.2
Can partnership and contracting out be a promising strategy for enhancing rural development where other methods have failed? Could the private production and delivery of services that used to be performed by government improve public sector productivity? A study of school busing in a rural county in Tennessee (USA) suggests that there is more to Public-Private Partnership (PPP) than what meets the eye. The paper concludes that the special rural context of a PPP can mitigate and change the Principal-Agent nature of the relationships between the partners from a zero sum game kind of a relationship to a collaboration and a win-win game.