In Situ Microwave Synthesis of SnO₂‐Porous Biomass Carbon as Anode Materials for Lithium‐Ion Batteries

Abstract

Using absorbent cotton fiber as raw material, the porous biomass carbon (PC) structure is obtained by the Mg 2þ template method. Then, SnO 2 particles are loaded on the surface and internal pores by microwave treatment to obtain a composite material as anode material for lithium ion batteries, which releases a stable capacity of 508 mAh g À1 after 300 cycles at a current density of 300 mA g À1 . The PC structure not only offers a large specific surface area and active sites, but also buffers the expansion and agglomeration of the SnO 2 particles during the deintercalation of lithium ions.

Unlocking Rapid Charging and Extended Lifetimes for Li-Ion Batteries Using Freestanding Quantum Conversion-Type Aerofilm Anode

“…Such long-term cycle stability at high C-rates represents the superior performance among any conversion-type batteries reported so far (Table S3). ,,,,,− In Figure g, the energy and power densities of the quantum SnO 2 anode device were plotted and compared to those of previously reported transition metal-based anodes. The 3 nm quantum electrode with the Sn–C bond exposed a high energy density of 4520 Wh kg –1 at 1 C and 1369 Wh kg –1 even at 20 C, indicating notably the highest value among the reported conversion-type-based anodes. − Apart from the high discharge capacity of quantum size SnO 2 anodes, they also exhibited a gradual rise in the capacity (Figures a and a,c) as the cycles progressed.…”

Integrated structure design and synthesis of a pitaya-like SnO2/N-doped carbon composite for high-rate lithium storage capability

“…38 To solve these two problems, loading SnO 2 nanostructures on various types of conductive carbon substrates is put forward to improve the conductivity and structural stability of SnO 2 . [39][40][41][42][43] Simultaneously, the porous design of the carbon substrate is developed to further accommodate the large volume change and promote the rapid transmission of Li + . 44 Nevertheless, SnO 2 nanoparticles that directly grow on the surface layer of the carbon materials would still migrate and aggregate during long cycles.…”

In situ growth of CoO nanosheets on a carbon fiber derived from corn cellulose as an advanced hybrid anode for lithium-ion batteries

“…Fig.7(a) the specific capacity at 100 mA g À1 , (b) the specific capacities of various biomass carbon,[30][31][32][33][34][35][36] (c) the rate capability and (d) Nyquist plots.…”