Dual‐Carbon‐Confined SnS Nanostructure with High Capacity and Long Cycle Life for Lithium‐ion Batteries

Abstract

SnS with high theoretical capacity is a promising anode material for lithium‐ion batteries. However, dramatic volume changes of SnS during repeated discharge/charge cycles result in fractures or even pulverization of electrode, leading to rapid capacity degradation. To solve this problem, we construct a dual‐carbon‐confined SnS nanostructure (denoted as SnS@C/rGO) by depositing semi‐graphitized carbon layers on reduced graphene oxide (rGO) supported SnS nanoplates during high‐temperature reduction. The dual carbon of rGO and in situ formed carbon coating confines growth of SnS during the high‐temperature calcination. Moreover, during the reversible Li+ storage the dual‐carbon modification enables good electronic conductivity, relieves the volume effect, and provides double insurance for the electrical contact of SnS even after repeated cycles. Benefiting from the dual‐carbon confinement, SnS@C/rGO exhibits significantly enhanced rate capability and cycling stability compared with the bare and single carbon modified SnS. SnS@C/rGO presents reversible capacity of 1029.8 mAh g−1 at 0.2 A g−1. Even at a high current density of 1 A g−1, it initially delivers reversible capacity of 934.0 mAh g−1 and retains 98.2% of the capacity (918.0 mAh g−1) after 330 cycles. This work demonstrates potential application of dual‐carbon modification in the development of electrode materials for high‐performance lithium‐ion batteries.

Monolithic three‐dimensional hollow nanoporous CuxO encapsulated mesoporous Cu heterostructures with superior Li storage properties

“…[1][2][3][4] Nowadays, with the fast growth of pure electric vehicles and aviation electronic industries, more and higher requirements are raised toward energy density, power density and safety of LIBs. [5][6][7][8] However, the widespread use of commercial graphite anodes heavily impeded further improvement in overall performance of LIBs because of its limited theoretical specific capacity (372 mAh g À1 ) and ultralow Li-insertion potential (<0.20 V vs. Li/Li + ). [9][10][11][12][13] Hence, it is imperative to seek alternative high-performance anode materials to meet the urgent demands.…”

“…Lithium‐ion batteries (LIBs), as a highly efficient rechargeable power source, have been broadly utilized in new energy vehicles, energy storage systems and other various industrial applications in light of their advantages of prolonged cycle life, reliable safety and high energy density over the past decades 1–4 . Nowadays, with the fast growth of pure electric vehicles and aviation electronic industries, more and higher requirements are raised toward energy density, power density and safety of LIBs 5–8 . However, the widespread use of commercial graphite anodes heavily impeded further improvement in overall performance of LIBs because of its limited theoretical specific capacity (372 mAh g −1 ) and ultralow Li‐insertion potential (<0.20 V vs. Li/Li + ) 9–13 .…”

Ultrahigh reversible lithium storage of hierarchical porous Co–Mo oxides via graphene encapsulation and hydrothermal S-doping

“…1,2 However, graphite, as an anode material that has been used commercially, has a low theoretical specic capacity (372 mA h g À1 ) that is inadequate for the incremental demand for energy density. 3,4 Transition metal oxides (TMOs), considering their high theoretical specic capacity, low cost, and environmental benignity, have been considered a signicant research direction to replace graphite. 5,6 However, their development is limited by their inferior conductivity and large volume expansion during the lithiation/delithiation processes, which cause rapid capacity fading and poor rate capability.…”

Approaching Superior Potassium Storage of Carbonaceous Anode Through a Combined Strategy of Carbon Hybridization and Sulfur Doping

“…[23][24][25] The advantageous synergetic effect between carbon and other components (e.g., Sb, Bi, P, Sn, metal oxides, sulfides, and selenide) can result in good cyclic life and rate performance. [26][27][28][29][30][31][32] For example, Zhang coworkers [33] reported a carbon coated Co 3 O 4 composite for potassium storage, which showed a decent cycling stability at 0.5 A g −1 and remained a capacity of 213 mA h g −1 after 740 cycles. Besides, the graphene matrix can effectively enhance the cyclic stability and rate performance of CoS and NiS 2 anodes.…”