Bioinspired Architectures and Heteroatom Doping To Construct Metal‐Oxide‐Based Anode for High‐Performance Lithium‐Ion Batteries

Abstract

The pursuit of increased energy density and longer lifespan lithium-ion batteries (LIBs) is urgently needed to satisfy a dramatically increased demand in the energy market. Currently, metal-oxide-based anodes are being intensively studied due to their higher capacities over current graphite anodes. This work introduces a sustainable strategy to construct a metal-oxide-based anode with high capacity and an extremely long lifecycle, in which the features of bioinspired architectures and heteroatom doping can contribute greatly to increased performances. In detail, 1D tubelike metal oxide (e.g., MnO) coated on an N-doped carbon framework (i.e. MnO/N-C) has been designed by using the naturally abundant and renewable Metaplexis japonica fibers (MJFs) as the biotemplate and heteroatom source. Benefiting from the uniqueness of structure and compositions, as-prepared MnO/N-C demonstrates extremely high rate capacities of 951, 777, 497, and 435 mAh g at the rates of 0.5, 2, 4, and 5 Ag , respectively, with a good stability of more than 1000 cycles. It was found that the electrochemical performances are superior to most previous MnO-based anodes, in which the faster kinetics of conversion due to the advantage of the ion/electron transportation and morphological evolution has been verified. It is hoped that the concept of bioinspired architectures with heteroatom doping can be applied in wider applications for increased capability.

Metal Catalyst to Construct Carbon Nanotubes Networks on Metal Oxide Microparticles towards Designing High‐Performance Electrode for High‐Voltage Lithium‐Ion Batteries

“…Metal oxides (MO x , M = Fe, [13] Co, [14] Mn, [15] Mo, [9,16] Sn, [17] Sb, [18] V, [19] etc.) are of great interest as anode materials in LIBs due to their high lithium storage capacities (>800 mAh g −1 vs 372 mAh g −1 of graphite anode and abundant resources.…”

“…[ 20 ] However, severe capacity decay always exists and is hard to overcome due to the low electrical conductivity and large volume variation upon cycling. [ 21 ] As a result, constructing the metal oxide with different nano morphologies (e.g., particles, [ 15a ] cubes, [ 22 ] fibers, [ 23 ] tubes, [ 24 ] etc. ), structures (e.g., hollow, [ 25 ] hierarchical [ 26 ] ), together with the combination of different carbon sources (e.g., CNTs, [ 27 ] graphene, [ 28 ] biomass‐derived carbon, [ 15b ] active carbon, [ 29 ] etc.…”

X‐ray Nano‐computed Tomography of Electrochemical Conversion in Lithium‐ion Battery

“…[22] Recently,s ynthetic approaches capable of retaining structural integrity and ensuring electrode stability for nanostructured metal oxides have been developed, which has only partly mitigated the voltage hysteresis issue. [16,[23][24][25][26] Indeed, the complexdisplacementr eaction pathway involving massive electrode reorganization actually affects the electrochemical potential stability upon prolonged cycling and leads to capacity decay, [24,27] thus limiting the practical application of metal oxide anodes. [28,29] Herein, an anometric CuO anode for lithium-ion batteries was investigated by combining electrochemical measurements and ex situ X-ray computedt omography (CT) at the nanoscale.…”

Large-Sized Nickel–Cobalt–Manganese Composite Oxide Agglomerate Anode Material for Long-Life-Span Lithium-Ion Batteries

“…Note that the b value of the Ni 0.6 Co 0.2 Mn 0.2 O x electrode is between 0.5 and 1. It has the combined behavior of Li + diffusion control (battery behavior, b = 0.5) and surface charge storage control (capacitance behavior, b = 1) . The contribution ratio of battery and capacitive behavior can be calculated by dividing the total current i into the capacitive and diffusion-controlled parts.…”