음극
음극은 양극과 유사하게 부극집전체와 부극합제로 구성되며 기능적으로는 전기화학적인 반응에 의해전자를 생성하고 소모할 수 있으며 집전체를 통하여 외부회로에 전자를 제공하는 역할을 한다. 부극합제는 부극활물질과 이를 고정하기 위한 결합제와 전자전도성을 향상시키기 위한 도전재
전지 조립
전지를 구성하는 anode로는 MCMB 나 Natural graphite를 사용하고, 전해액은 EC:DMC:EMC 가 1:1:1 vol%의 섞여있는 용매에 에 1M의 LiPF6가 salt로 녹아있는 용액, 그리고 cathode는 lithium foil를 사용한다. Cell assembly는 Ar 분위기의 glove box에서 행한다.
3-2 전지 성능 측정
3-2-1 측정장치
• impedance analyzer
2. 1. 그래핀의 제법
그래핀을 얻는 방법은 크게 물리적 방법과 화학적 방법으로 나눌 수 있다.
물리적 방법은 바로 graphitic material로부터 박리하는 방법이다.
접착성이 있는 테이프 위에 흑연조각을 올리고 테이프를 한번 접었다 떼면 접착성에 의해 흑연이 묻어나와 둘로 나뉜다. 이렇게 붙였다 떼
Do not use expansive catalyst
Do not need reforming
Do not need electrolyte supplement
Price is cheaper than others
Technical characteristic
simple process caused by various fuels
(Natural gas/coal gas)
Do not need reforming
(only for using hydrogen)
variety form and high efficiency are possible because components are solid
Electrochemical devices that convert chemical energy in fuels into electrical energy directly
High efficiency & low environmental impact
Component
Five fundamental classes exist, depending on the nature of the electrolyte
PAFC
AFC
natural gas sources. Once ammonia gas has been formed, it is liquefied by cooling it with water. Nitrogen and hydrogen that have not yet been converted to ammonia are recycled through the system. In addition to Haber-Bosch synthesis, other industrial sources of ammonia also exist; it is created as a by-product, for example, during the production of coal and coke-oven gas.
In the early 1990's t
Magnolia Script
In the "New York Herald..."
November 26, year... 1911...
there is an account
of the hanging of three men.
They died for the murder
of Sir Edmund William Godfrey...
husband, father, pharmacist...
and all-around
gentleman resident of...
Greenberry Hill, London.
He was murdered
by three vagrants...
whose motive was simple robbery.
They were identified as...
Joseph Green...
Stanley Be
PLASTIC MAN
by
Larry and Andy Wachowski
March 17, 1995
FADE IN:
INT. CAGE
We are a lab mouse.
Our world is a cage; the laboratory beyond the wire mesh
has the sprawling limitlessness of a universe with dark
endless voids and immense technological instruments
gleaming with celestial light.
We can hear a WOMANS VOICE though we cant understand
what she is saying.
There are several other lab mice in
Ⅰ. Introduction
개요1),2),5),21),24)
옛사람들은 나노과학과 나노기술의 원리를 알지 못했음에도 불구하고 나노기술 또는 마이크로미터 수준의 기술을 이용하여 다양한 물건들을 만들어 사용했다. 리쿠르고스 컵(Lycurgus Cup)은 아름다운 루비색을 내는 컵으로서 기원 후 4세기경 로마시대에 제조되
ENTRAPMENT
Ronald Bass
First Draft Screenplay
December 2, 1996
Story by:
Ronald Bass
and Michael Herzberg
EXT. HANCOCK TOWER, CHICAGO - LATE NIGHT
Lake Shore Drive. Four oclock in the morning. Minimal traffic,
minimal life. As MAIN TITLES BEGIN, we PAN UP the face of...
...Hancock Tower. Up, up, forty floors, sixty, eighty, very dark
up here, street sounds fading fast, and as CREDITS CONTINUE we