Solid-State Construction of CuO-Cu₂O@C with Synergistic Effects of Pseudocapacity and Carbon Coating for Enhanced Electrochemical Lithium Storage.

ABSTRACT: The pseudocapacitive effect can improve the electrochemical lithium storage capacity at high-rate current density. However, the cycle stability is still unsatisfactory. To overcome this issue, a multivalent oxide with a carbon coating represents a plausible technique. In this work, a CuO-Cu₂O@C composite has been constructed by a one-step bilayer salt-baking process and utilized as anode material for lithium-ion batteries. At a current density of 2.0 A g^-1, the as-prepared composite delivered a stable discharge capacity of 431.8 mA h g^-1 even after 600 cycles. The synergistic effects of the multivalence, the pseudocapacitive contribution from copper, and the carbon coating contribute to the enhanced electrochemical lithium storage performance. Specifically,

SUBMITTER: Du G 

PROVIDER: S-EPMC11397226 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature