In Situ Precipitation‐Induced Growth of Leaf‐like CuO Nanostructures on Cu–Ni Alloys for Binder‐Free Anodes in Li‐Ion Batteries. Issue 2 (13th December 2019)

• Record Type: Journal Article
• Authors: Ha, Jaeyun; Kim, Yong‐Tae; Choi, Jinsub
• Is Part Of: ChemSusChem. Volume 13:Issue 2(2020)
• Page Start: 419
• Page End: 425
• Publication Date: 2019-12-13
• Subjects: copper oxide -- leaf-like structures -- oxidant -- precipitation-induced growth -- solid electrolyte interphase layer; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201902393
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: CuC2 O4 ⋅ x H2 O was facilely prepared on a Cu–Ni alloy substrate by in situ precipitation‐induced growth by using a mixture of sodium persulfate, hydrogen peroxide, and oxalic acid. Thermal annealing allowed the conversion of CuC2 O4 ⋅ x H2 O to leaf‐like CuO nanostructures with a thickness of a few tens of micrometers of sub‐sized nanoparticles, which were applied for fabricating binder‐free anodes for lithium‐ion batteries. Ni was a nucleation site for CuC2 O4 ⋅ x H2 O, which was uniformly formed on the entire substrate. The concentration of each component in the mixture solution caused significant morphological changes because of the different elution of copper ions. CuO nanostructures annealed at 550 °C showed large areal and gravimetric capacity with excellent capacity retention of 95.5 % after 200 cycles at a high current density because of their appropriate structural morphology, which not only allowed the formation of a stable solid electrolyte interphase layer but also enabled a reversible reaction during the charge/discharge process. Abstract : Like a leaf on the wind : Thick leaf‐like CuO nanostructures annealed at 550 °C show large areal and gravimetric capacity owing to their appropriate structural morphology, which not only allows the formation of a stable solid electrolyte interphase layer but also enables a reversible reaction during the charge/discharge process.