Editing Lithium polymer battery (section)

== Components ==

A typical cell has four main components: a positive [[electrode]], a negative electrode, a separator, and an [[electrolyte]]. The separator itself may be a [[polymer]], such as a microporous film of [[polyethylene]] (PE) or [[polypropylene]] (PP); thus, even when the cell has a liquid electrolyte, it will still contain a "polymer" component. In addition to this, the positive electrode can be further divided into three parts: the lithium-transition-metal-oxide (such as LiCoO<sub>2</sub> or LiMn<sub>2</sub>O<sub>4</sub>), a conductive additive, and a polymer binder of [[Polyvinylidene fluoride|poly(vinylidene fluoride)]] (PVdF).<ref name="book_1"/><ref name="book_2"/> The negative electrode material may have the same three parts, only with [[carbon]] replacing the lithium-metal-oxide.<ref name="book_1">{{cite book |last=Yazami |first=Rachid |editor-last=Ozawa |editor-first=Kazunori |title=Lithium ion rechargeable batteries |publisher=Wiley-Vch Verlag GmbH & Co. KGaA |date=2009 |chapter=Chapter 5: Thermodynamics of Electrode Materials for Lithium-Ion Batteries |isbn=978-3-527-31983-1}}</ref><ref name="book_2">{{cite book |last=Nagai |first=Aisaku |editor-last1=Yoshio |editor-first1=Masaki |editor-last2=Brodd |editor-first2=Ralph J. |editor-last3=Kozawa |editor-first3=Akiya |title=Lithium-ion batteries |publisher=Springer |date=2009 |chapter=Chapter 6: Applications of Polyvinylidene Fluoride-Related Materials for Lithium-Ion Batteries |isbn=978-0-387-34444-7 |doi=10.1007/978-0-387-34445-4|bibcode=2009liba.book.....Y }}</ref> The main difference between lithium-ion polymer cells and lithium-ion cells is the physical phase of the electrolyte, such that LiPo cells use dry solid, gel-like electrolytes, whereas Li-ion cells use liquid electrolytes.