Abstract
A simple seaweed biomass conversion strategy is proposed to synthesize highly porous multishelled Ni-rich Li(Ni x Co y Mn z )O2 hollow fibers with very low cation mixing. The low cation mixing results from the cation confinement by the novel "egg-box" structure in the alginate template. These hollow fibers exhibit remarkable energy density, high-rate capacity, and long-term cycling stability when used as cathode material for Li-ion batteries.
Highlights
It is envisaged that a multishelled Nirich Li(NixCoyMnz)O2 hollow fiber (HF), combining the advantages of a 1D morphology and a porous multishelled structure, should exhibit high-performance as cathode materials for lithium ion batteries (LIBs). In this Communication, we report the synthesis of a series of multishelled Ni-rich Li(NixCoyMnz)O2 (x = 0.8, 0.7, 0.65, and 0.5) HFs with low cation mixing using sustainable seaweed (alginate) fiber as template
Layered Li(NixCoyMnz)O2 is one of the most promising cathode materials for lithium ion batteries (LIBs), due to its stable structure, compositional flexibility, thermal stability, low cost, and relatively high reversible capacity.[1,2] In particular, the Nirich oxides such as Li(NixCoyMnz)O2 (x ≥ 0.5) have attracted intense research attention,[3] since they provide very high specific capacity, ≈212 mAh g−1 for x = 0.8 and 220 mAh g−1 for x = 0.86
It is envisaged that a multishelled Nirich Li(NixCoyMnz)O2 hollow fiber (HF), combining the advantages of a 1D morphology and a porous multishelled structure, should exhibit high-performance as cathode materials for LIBs
Summary
It is envisaged that a multishelled Nirich Li(NixCoyMnz)O2 hollow fiber (HF), combining the advantages of a 1D morphology and a porous multishelled structure, should exhibit high-performance as cathode materials for LIBs. In this Communication, we report the synthesis of a series of multishelled Ni-rich Li(NixCoyMnz)O2 (x = 0.8, 0.7, 0.65, and 0.5) HFs with low cation mixing using sustainable seaweed (alginate) fiber as template.
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