Anchoring Sb₆O₁₃ Nanocrystals on Graphene Sheets for Enhanced Lithium Storage

Abstract

SbO/reduced graphene oxide (SbO/rGO) nanocomposite was synthesized by the solvothermal method using SbO and graphene oxide as raw material. On the basis of the physical and electrochemical characterizations, SbO nanocrystals of 10-20 nm size were uniformly anchored on rGO sheets, and the nanocomposite displayed a large reversible specific capacity of 1271 mA h g and an excellent cyclability of 1090 mA h g after 140 cycles at 100 mA g when proposed as a potential anode material for lithium ion batteries, emphasizing the advantages of anchoring of SbO nanocrystals on rGO sheets for the maximum utilization of electrochemically active SbO and rGO for lithium storage.

Superfine SnO2 Uniformly Anchored on Reduced Graphene Oxide Sheets by a One‐Step Solvothermal Method for High‐Performance Lithium‐Ion Batteries

“…The mass loss of about 4.4 wt% subsequently during 200 to 350 °C is due to dehydration condensation of carbonyl/carboxyl on the surface of the material ,. Furthermore, approximately 33 wt% mass loss during 350 to 600 °C can be owed to the burning of rGO ,. Through the above analysis, we can easily calculate that the SnO 2 content in SnO 2 /rGO hybrid is about 61.5 wt% on the basis of eq.…”

“…Through the above analysis, we can easily calculate that the SnO 2 content in SnO 2 /rGO hybrid is about 61.5 wt% on the basis of eq. (S1) (see Supporting Information, SI) ,…”

Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes

“…The Sb 3d spectrum of the Mn‐PAA⊂GS⊂G (Figure S13a, Supporting Information) exhibits two characteristic peaks at 530.9 and 540.2 eV, corresponding to the Sb 3d 5/2 and Sb 3d 3/2 of pentavalent Sb 5+ species respectively. [ 10,21,36 ] Besides, there are two O 1s peaks resolved at 531.3 and 533.4 eV for the Mn‐PAA⊂GS⊂G, which are attributed to the oxygen components seperately originated from the Mn‐PAA and the GS⊂G. [ 36 ] More notably, the Mn 2p spectrum of the Mn‐PAA⊂GS⊂G is obtained (Figure S13b, Supporting Information), and it can be resolved into two main peaks situated at 641.7 (Mn 2p 3/2 ) and 653.8 eV (Mn 2p 1/2 ), corresponding to the Mn 2+ , which confirms the existence of divalent manganese in the Mn‐PAA⊂GS⊂G.…”

“…[ 10,21,36 ] Besides, there are two O 1s peaks resolved at 531.3 and 533.4 eV for the Mn‐PAA⊂GS⊂G, which are attributed to the oxygen components seperately originated from the Mn‐PAA and the GS⊂G. [ 36 ] More notably, the Mn 2p spectrum of the Mn‐PAA⊂GS⊂G is obtained (Figure S13b, Supporting Information), and it can be resolved into two main peaks situated at 641.7 (Mn 2p 3/2 ) and 653.8 eV (Mn 2p 1/2 ), corresponding to the Mn 2+ , which confirms the existence of divalent manganese in the Mn‐PAA⊂GS⊂G. [ 37,38 ] The two N 1s peaks of the Mn‐PAA⊂GS⊂G can be ascribed to pyridinic‐N (398.8 eV) and pyrrolic‐N (400.2 eV) (Figure S13c, Supporting Information), and the N‐doping is believed to be beneficial for enhancing the electronic conductivity of the graphene and improving its adsorption ability to active species.…”

“…The difference between the first and subsequent cycles could be ascribed to a surface/structure activation process of electrode materials accompanied with the formation of solid electrolyte interfaces (SEI) layer. [ 10,36 ] Note that there is another weak cathodic peak at ≈0.25 V, and it shifts to 0.35 V in the following cycles. Given that the Mn‐PAA contains Mn 2+ that is also an electrochemically active species, it is reasonable to speculate that this cathodic peak could be ascribed to the reduction of Mn 2+ to metallic Mn 0 .…”