Review of the Stability/Capacity Trade-off in Silver Hollandite Lithium Battery Cathodes

Journal Article · Mon Jan 01 00:00:00 EST 2018 · MRS Advances

DOI:https://doi.org/10.1557/adv.2018.306· OSTI ID:1470270

Smith, Paul F.; Lutz, Diana M.; Takeuchi, Esther S.; Takeuchi, Kenneth J.; Marschilok, Amy C.

ABSTRACT Highly detailed structural characterization is required to understand the discharge mechanism in order to effectively investigate α-MnO₂structured lithium battery cathode materials. This paper discusses recent findings which elucidate the lithiation mechanism of silver-hollandite, Ag_xMn₈O₁₆. For Ag_1.2Mn₈O₁₆, the structure is not significantly perturbed during the first 2 equivalents of lithiation and the electrochemistry is highly reversible. Upon 4 equivalents of lithiation, the structure becomes highly distorted, in correlation with capacity fade observed over 40 cycles. Notably, regarding capacity fade, modifications to Ag/Mn ratio are less impactful than modifications to the α-MnO₂crystallite size. This is shown in comparisons of two materials with the same stoichiometry (Ag_1.4Mn₈O₁₆) and differing crystallite size (10 and 15 nm).

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: SC0012673
• OSTI ID: 1470270
• Journal Information: MRS Advances, Vol. 3, Issue 14; Related Information: m2M partners with Stony Brook University (lead); Brookhaven National Laboratory; Columbia University; Georgia Institute of Technology; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; University of California, Berkeley; University of North Carolina at Chapel Hill; ISSN 2059-8521
• Publisher: Materials Research Society (MRS)
• Country of Publication: United States
• Language: English

Related Subjects

energy storage (including batteries and capacitors)
charge transport
mesostructured materials