Bimetallic CoMoS Composite Anchored to Biocarbon Fibers as a High-Capacity Anode for Li-Ion Batteries

Abstract

Our work reports the hydrothermal synthesis of a bimetallic composite CoMoS, followed by the addition of cellulose fibers and its subsequent carbonization under Ar atmosphere (CoMoS@C). For comparison, CoMoS was heat-treated under the same conditions and referred as bare-CoMoS. X-ray diffraction analysis indicates that CoMoS@C composite matches with the CoMoS 4 phase with additional peaks corresponding to MoO 3 and CoMoO 4 phases, which probably arise from air exposure during the carbonization process. Scanning electron microscopy images of CoMoS@C exhibit how the CoMoS material is anchored to the surface of carbonized cellulose fibers. As anode material, CoMoS@C shows a superior performance than bare-CoMoS. The CoMoS@C composite presents an initial high discharge capacity of ∼1164 mA h/g and retains a high specific discharge capacity of ∼715 mA h/g after 200 cycles at a current density of 500 mA/g compared to that of bare-CoMoS of 102 mA h/g. The high specific capacity and good cycling stability could be attributed to the synergistic effects of CoMoS and carbonized cellulose fibers. The use of biomass in the anode material represents a very easy and cost-effective way to improve the electrochemical Li-ion battery performance.

Realization of Oxygen Reduction and Evolution Electrocatalysis by In Situ Stabilization of Co Nanoparticles in a Redox‐Active Donor‐Acceptor Porous Organic Polymer

“…The electrode/electrolyte interface charge transfer resistance is found to be 56 Ωfor Co@TAPA‐PG. Notably, the lower resistance value for Co@TAPA‐PG in comparison to TAPA‐PG exhibits better electron transport during the electrochemical reaction in the former case …”

Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

“…To obtain the optimal performance of an ASC, the mass ratio of the electrodes can be adjusted [Eq. (9)]. [25,27]…”

“…The emergence of EVs has also improvedt he demand for EES devices. [9] Electrical energy can be stored in two fundamentally differentw ays:1 )indirectly through electrochemical energy storage in the form of batteries, and2 )directly throughe lectrostatic energy storage in the form of capacitors and supercapacitors (SCs). [10,11] Unprecedented fast-growing technology and the increasing energy crisis have boosted the development of efficient EES systems, such as batteriesa nd SCs.…”

Quantum Dot bioconjugates for diagnostic applications

“…In the last decades the development of novel nanomaterials have gained increasing interest due to their fascinating physicochemical properties, which offer a great potential in different fields, such as (bio)analytical chemistry [3,4], water treatment [5], catalysis, electrocatalysis [6][7][8][9], cancer treatment [10], energy storage devices [11], etc. Although there is no much information available about production of QDs, it was possible to estimate worldwide and Europe-wide production and use of ten different nanomaterials, including quantum dots, from a survey sent to companies producing and using engineered nanomaterials.…”