Nitrogen-doped carbon nanoboxes as high rate capability and long-life anode materials for high-performance Li-ion capacitors

Hollow Porous α-Fe2O3 Nanoparticles as Anode Materials for High-Performance Lithium-Ion Capacitors

“…As an anode material for LICs, the porous shell of the α-Fe 2 O 3 HPNP facilitates lithium-ion diffusion to and from the inner space of the hollow nanoparticle, and the hollow space of the α-Fe 2 O 3 HPNP serves as a nanoreactor to offer fast local lithiation/delithiation and to accommodate the large volume variation created during charge/discharge cycles. 28 One can thus expect that the use of the α-Fe 2 O 3 HPNP as the anode material for LICs would effectively lessen the kinetics imbalance between the anode and cathode as well as the capacity decay resulting from the anode material cracking caused by the large volume variation during cycling, achieving the goal of developing a high-rate capability anode material. To assemble full-cell LICs, glucose-derived carbon nanospheres, termed as GCNS, of a high specific surface area of 1687 m 2 g −1 , were prepared as the cathode material to couple with the α-Fe 2 O 3 HPNP anode, as illustrated in Figure 1.…”

“…To the best of our knowledge, it is the first study on the fabrication of hollow porous α-Fe 2 O 3 nanoparticles from Fe-MOF and the first development for α-Fe 2 O 3 HPNP-based LICs. As an anode material for LICs, the porous shell of the α-Fe 2 O 3 HPNP facilitates lithium-ion diffusion to and from the inner space of the hollow nanoparticle, and the hollow space of the α-Fe 2 O 3 HPNP serves as a nanoreactor to offer fast local lithiation/delithiation and to accommodate the large volume variation created during charge/discharge cycles . One can thus expect that the use of the α-Fe 2 O 3 HPNP as the anode material for LICs would effectively lessen the kinetics imbalance between the anode and cathode as well as the capacity decay resulting from the anode material cracking caused by the large volume variation during cycling, achieving the goal of developing a high-rate capability anode material.…”

Interpenetrated N-rich MOF derived vesicular N-doped carbon for high performance lithium ion battery

“…If the current density recovers to 0.2 A g −1 , the discharge capacity goes back to 734 mA h g −1 and is restored to 96%, revealing the good rate performance of N/C-900. 64,65 The excellent electrochemical performance might be attributed to the suitably thicker wall and snug pore size of N/C-900 which can reduce the volumetric expansion and facilitate Li ion insertion/extraction (shortening the diffusion path). Table S2 (ESI †) displays the N content, current density, cycle number and capacity of the N/C-900 in this work compared with various reported N/C materials for LIBs.…”

Sustainable silicon anodes facilitated via a double‐layer interface engineering: Inner SiOx combined with outer nitrogen and boron co‐doped carbon

“…12,20 To achieve uniform and controllable carbon coatings, various polymers (e.g., poly-(3, 4-ethylenedioxythiophene), 21 polypyrrole, 21 and polyaniline 21,22 ) have been proposed as carbon sources in recent years. By utilizing in-situ oxidative polymerization of the mentioned polymers on Si surface, even uniform carbon coatings with an ultra-thin thickness could be further converted, which is quite difficult by using glucose, 23 sodium citrate 24 or other organic carbon sources. Although the flexible buffer shell can stabilize the volume variation, the rate performance still needs to be improved.…”