Cycle life enhancement in Cu-Sn anodes / Jeff Wolfenstine [and others].

Format:

Book

Government document

Contributor:

Wolfenstine, Jeff

U.S. Army Research Laboratory

Series:

ARL-TR (Aberdeen Proving Ground, Md.) ; 2664.

ARL-TR ; 2664

Language:

English

Subjects (All):

Copper-tin alloys.

Anodes.

Lithium cells.

Physical Description:

1 online resource (iii, 8 pages) : illustrations.

Place of Publication:

Adelphi, MD : U.S. Army Research Laboratory, [2002]

Summary:

This technical report summarizes the work on two different approaches that have been used to increase the cycle life of active-inactive composites in the copper-tin system. The first approach is to reduce the particle size of the active-inactive composities to the nano-scale (<100 nm). The second approach is the addition of extra elements that segregate to grain/phase boundaries and increase the cohesive strength of the boundary. Both approaches significantly improved the capacity retention of a Cu6Sn5 alloy. A larger improvement in capacity retention was exhibited by the addition of 10-wt.% iron compared to the reduction of the particle size to the nano-scale. The volumetric capacity of the Cu6Sn5 alloy containing 10 wt. % iron at 100 cycles is almost three times the theoretical capacity of graphite. The Cu6Sn5-10 wt.% Fe material has potential as a replacement anode for graphite in lithium-ion batteries.

Notes:

Title from title screen (viewed on Feb. 24, 2011).

"May 2002."

Includes bibliographical references (pages 5-6).

OCLC:

227997287

Access Restriction:

Approved for public release.