Insert Zn Nanoparticles into the 3D Porous Carbon Ultrathin Films as a Superior Anode Material for Lithium Ion Battery

Abstract

A flexible strategy is exploited to insert Zn nanoparticles into the pores of highly stable 3D network of carbon ultrathin films (P‐Zn/C) that can effectively localize the postformed Zn nanoparticles, thereby solving the problem of structural degradation, and thus achieve improved anode performance. A maximum capacity of 657.3 mA h g−1 at a current density of 200 mA g−1 after 50 cycles is achieved for P‐Zn/C. Even at a high current density of 2 A g−1, a capacity of 653 mA h g−1 is maintained after 1000 cycles, indicating that it could be a promising anode for lithium ion batteries. By comparing the capacitive and diffusion contribution qualitatively and quantitatively, the result reveals that the enhanced electrochemical performance mainly originates from the pseudocapacitance storage mechanism.

Highly Dispersed ZnSe Nanoparticles Embedded in N‐Doped Porous Carbon Matrix as an Anode for Potassium Ion Batteries

“…Figure S3 in the Supporting Information shows the XRD pattern of Zn@NDPC. Although the diffraction peak of metallic Zn can be inconspicuous, Zn cations should be reduced to metallic Zn after the heat treatment, as previously reported . The diffraction peaks with weak intensity of Zn@NDPC indicate the poor crystallinity and the low degree of graphitization.…”

“…Interestingly, when the carbonizing temperature arrived at 800 °C, the XRD pattern of Zn@NDPC‐800 matched well with the common carbon material. This can be attributed to the volatilization of partial metallic Zn at 800 °C, resulting in the low content of metallic Zn within Zn@NDPC‐800 . Therefore, the above reasons brought about the low intensity of ZnSe@NDPC‐800 ( Figure a).…”

Synthesis of Manganese‐Based Prussian Blue Nanocubes with Organic Solvent as High‐Performance Anodes for Lithium‐Ion Batteries

“…This is because the broad anode peaks at about 0.98 V and 1.21 V can be assigned to the oxidation of metallic Mn 0 and Fe 0 to Mn 2+ and Fe 2+ , respectively. Finally, since the third cycle, no new redox peaks appeared and the intensity of the peaks did not change significantly, and the integral region of the CV curve remained constant, which suggest the high reversibility of the insertion and extraction of lithium ion …”

Tailoring MoS2Ultrathin Sheets Anchored on Graphene Flexible Supports for Superstable Lithium‐Ion Battery Anodes

“…Graphite is employed as a predominant anode material for commercial LIBs. However, its low theoretical capacity of 372 mAh g −1 results in an obstacle for the potential applications . It is a considerable research direction to develop alternative anode materials with improved lithium‐ion storage performance …”