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lithium economy : ウィキペディア英語版
lithium economy

The lithium economy is a concept analogous to the hydrogen economy, methanol economy, ethanol economy, electron economy, vegetable oil economy, or liquid nitrogen economy but where the energy storage medium is lithium. Analogous "economies" are the "aluminium economy" where the energy storage medium (fuel) is aluminium (typically aluminium-gallium).
The hydrogen economy as a low-carbon solution to land transport has problems in generation, distribution (infrastructure), on-board storage and cost of power converter (fuel cell). The lithium economy has analogous problems in all four areas, but considered separately, the routes to their solution have different absolute limits and different timescales for their solutions.
The lithium economy concept is used primarily as a political argument to prevent over-domination of the post-carbon energy future by oil companies; and as a post-carbon economy on which action can be taken now instead of deferred to some future date (see FreedomCAR project).
The lithium economy differs from the other proposed future fuel economies in that the transition roadmap begins with conventional rechargeable batteries using conventional Li-ion or Lithium polymer cell batteries and progressing to chemistries (such as Li-S and Li-iron-phosphate) and cell types with higher energy densities. Eventually, anode replacement Li-air or Li-water cells are envisaged where only anodes (lithium metal) are replaced.
The energy is stored in unoxidised lithium atoms, which release energy when oxidised. A lithium atom is seven times as heavy as a hydrogen atom, and at room temperature, hydrogen is a gas, while lithium is solid. This means energy per mass is much worse, but since lithium is much more compact, it has more energy per volume. In fact, storing hydrogen requires so much ancillary equipment or material that lithium is also competitive in energy per mass when the whole system is considered.
==See also==

* Battery electric vehicle

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「lithium economy」の詳細全文を読む



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