by lithium ion intercalation
Si has theoretical capacity of 4200mAh/g
Due to it’s large volume change, pulverization can be occurred.
Silicon has high-capacity but poor cycle stability
Carbon has low-capacity but good cycle stability
So silicon/carbon composites can have higher capacity than single carbon anode,
and better cycle stability than single silicon anode.
1. What is the transportation industry??
1. Concept of transportation
Transport or transportation is the movement of people, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations. Transport is important since it enables trade between peoples, which in
Ⅰ. 서론
우리 해운산업의 위상이 참으로 높아졌다. 어느 나라를 가더라도 한진해운, 현대상선의 컨테이너가 도로를 달리고 있는 모습을 쉽게 볼 수 있고 유럽에 가서 Pan Ocean, SK Shipping을 대면 모르는 해운업자들이 없는 형편이다. 미서안 롱비치항의 한진해운 터미널은 크기뿐만 아니라 운영 효율측
1. Location-Based Service Background
1.1. Definition of Location-Based Service
Location-Based services refer to general class of computer program-level services used to include specific controls for location and time data as control features in computer programs. Location-Based services utilize location information to improve business productivity as well as adding value to a comfortable life.
What is a Mobile Device
A mobile device is a pint-sized computing device.
Computers have been miniaturized into industrial and personal handhelds
How the mobile devices works
Just as there are several different types of mobile messaging (SMS, EMS, MMS, etc.) there are also several different mobile phone standards:
- AMPS
- TDMA
- GSM
-CDMA