JP2010519718A5

JP2010519718A5 -

Info

Publication number: JP2010519718A5
Application number: JP2009551775A
Authority: JP
Filing date: 2008-02-05
Publication date: 2011-03-24

Claims

An electrolyte comprising a vinylene carbonate additive having the structure:

Wherein R ¹ is a C ₁ -C ₄ alkyl or alkenyl group;
A composition comprising a material having the formula : Si _x Sn _q M ¹ _y C _z , wherein q, x, y, and z represent mole percentages, each mole percentage being Li in the composition Based on the number of moles of all elements except
(Q + x)> 2y + z, q and z are 0 or more, M ¹ is selected from a transition metal, Y, or a combination thereof, and Si, Sn, M ¹ , and C elements are non-containing Si Arranged in the form of a multiphase microstructure consisting of a crystalline phase, a nanocrystalline phase containing metal silicide, an amorphous phase containing Sn (when q> 0), and a phase containing silicon carbide (when z> 0) lithium-ion electrochemical cell comprising an anode composition comprising a composition are, a.

An electrolyte additive comprising ethylene carbonate having the structure:

And; (and Q is an alkyl or alkenyl group F or Cl, or _C 1 -C ₄ wherein, X is H, F, or be Cl)
A composition comprising a material having the formula : Si _a Al _b M ² _c Sn _d E ¹ _e In _p , wherein a, b, c, d, e, and p represent mole percentages and each mole The percentage is based on the number of moles of all elements other than Li in the composition, M ² is selected from a transition metal or combination of transition metals, and E ¹ includes Y, lanthanide, actinide, or combinations thereof 35 ≦ a ≦ 70, 1 ≦ b ≦ 45, 5 ≦ c ≦ 25, 1 ≦ d ≦ 15, 2 ≦ e ≦ 15, and 0 ≦ p ≦ 15, and the alloy composition contains Si. lithium containing and ^E containing ¹ and Sn (when p is 0), or ^E 1, Sn, and a in (case of p> 0) and an anode composition comprising a composition which is a mixture of nanocrystalline phase, the Ion electrochemical battery.

(A) vinylene carbonate having the structure:

Or b) an electrolyte additive comprising at least one of ethylene carbonate having the structure:

Where R ¹ is a C ₁ -C ₄ alkyl or alkenyl group; X is H, F, or Cl; Q is F or Cl or a C ₁ -C ₄ alkyl or alkenyl group ; and electrode compositions which have a particle having an average particle size ranging from about 1μm~ about 50 [mu] m, the particles comprise may share at least one common phase boundary, the electrochemically active phase and an electrochemically non An active phase,
The electrochemically inert phase comprises at least two metal elements in the form of an intermetallic compound, a solid solution, or a combination thereof;
(I) Each phase has no crystallites greater than 100 nm before cycling,
(Ii) An electrochemical cell in which the electrochemically active phase is an ethylene carbonate that is amorphous after the electrode is cycled through one complete charge-discharge cycle in a lithium ion battery.