Graphene Oxide Wrapped Amorphous Copper Vanadium Oxide with Enhanced Capacitive Behavior for High‐Rate and Long‐Life Lithium‐Ion Battery Anodes

Abstract

Graphene oxide‐wrapped amorphous copper vanadium oxide is fabricated through a template‐engaged redox reaction followed by vacuum dehydration. This material exhibits high reversible capacity, excellent rate capability, and out standing high‐rate cyclability. The outstanding performance is attributed to the fast capacitive charge storage and the in situ formed copper with enhanced electrical conductivity.

Facile synthesis and lithium storage performance of (NH4)2V3O8 nanoflakes

“…Vanadium oxides and their derivatives have received increasing attention as new cathode materials for LIBs due to their high specific capacity, facile synthesis and low cost [1][2][3]. Of these materials, V 2 O 5 is the most studied one.…”

Thermal Induced Strain Relaxation of 1D Iron Oxide for Solid Electrolyte Interphase Control and Lithium Storage Improvement

“…MnOOH template is well crystallized ( Figure S1a, Supporting Information) and shows an uniform 1D nanowire morphology with a diameter of ≈100 nm ( Figure S1b,c, Supporting Information). The resulting XRD pattern shows two weak and broad peaks between 10° and 80° ( Figure S1d, Supporting Information), suggesting the amorphous nature or low crystallization of the as-prepared Fe(OH) 3 . The resulting XRD pattern shows two weak and broad peaks between 10° and 80° ( Figure S1d, Supporting Information), suggesting the amorphous nature or low crystallization of the as-prepared Fe(OH) 3 .…”

“…After the redox reaction, the diffraction peaks from MnOOH phase entirely disappears, indicating the complete consumption of MnOOH. The relatively low synthesis temperature (room temperature) is responsible for the low crystallinity of Fe(OH) 3 . The relatively low synthesis temperature (room temperature) is responsible for the low crystallinity of Fe(OH) 3 .…”

“…[1][2][3][4][5] With a theoretical capacity of 1007 mA h g −1 and improved safety, hematite (α-Fe 2 O 3 ) has been regarded as one of the most promising anode materials for next-generation high energy lithium ion batteries. [1][2][3][4][5] With a theoretical capacity of 1007 mA h g −1 and improved safety, hematite (α-Fe 2 O 3 ) has been regarded as one of the most promising anode materials for next-generation high energy lithium ion batteries.…”

A New Way to Prepare MoO3/C as Anode of Lithium ion Battery for Enhancing the Electrochemical Performance at Room Temperature

“…Two compressed semicircles in high/middle frequencies and an oblique line in low frequency can be clearly observed. As previously reported [34][35][36], the Ohmic resistance (R s ) of the sample is determined by the intercept in the real axis; the semicircle in the high frequency range reflects the resistance related to the Li ion diffusion across the electrode-electrolyte interface (R f ); and the semicircle in the middle frequency range represents the charge transfer resistance (R ct ). The oblique line at low frequencies is attributed to the Warburg impedance, related with the ionic diffusion into the bulk electrodes.…”