TY - JOUR
T1 - Constructing Flexible and Binder-Free NaTi2(PO4)3 Film Electrode with a Sandwich Structure by a Two-Step Graphene Hybridizing Strategy as an Ultrastable Anode for Long-Life Sodium-Ion Batteries
AU - Guo, Donglei
AU - Qin, Jinwen
AU - Zhang, Chaozhen
AU - Cao, Minhua
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/6/6
Y1 - 2018/6/6
N2 - Flexible energy storage devices show promising advantages in next-generation bendable, wearable, and implantable electronic systems, and therefore, they attract considerable interest for researchers to fulfill requirements of future energy storage devices. Here, we report a facile two-step strategy to construct flexible and binder-free NaTi2(PO4)3/graphene film with a sandwich structure (GN/NaTi2(PO4)3/GN). Such a design makes the resulting film with an excellent flexibility, which can be used for a binder-free anode for flexible sodium-ion batteries (SIBs). GN nanosheet supported NaTi2(PO4)3 nanocrystals (NaTi2(PO4)3/GN) are first prepared by a facile hydrothermal route. Then, the resultant NaTi2(PO4)3/GN hybrid is embedded homogeneously in interconnected GN nanosheet framework to form three-dimensional flexible GN/NaTi2(PO4)3/GN film. The flexible film exhibits excellent cycling stability (91% capacity retention over 1000 cycles at 500 mA g-1) for sodium half cells. Furthermore, it can be assembled into flexible full SIBs (Na0.44MnO2 as the cathode) for practical application. The flexible full battery shows good cycling stability both under flat and bent states, maintaining 92.9% retention after the first 30 cycles under a flat state compared to the original capacity and 86% retention after another 40 cycles under a bent state. This synthesis route offers a general method for constructing other flexible films for SIBs.
AB - Flexible energy storage devices show promising advantages in next-generation bendable, wearable, and implantable electronic systems, and therefore, they attract considerable interest for researchers to fulfill requirements of future energy storage devices. Here, we report a facile two-step strategy to construct flexible and binder-free NaTi2(PO4)3/graphene film with a sandwich structure (GN/NaTi2(PO4)3/GN). Such a design makes the resulting film with an excellent flexibility, which can be used for a binder-free anode for flexible sodium-ion batteries (SIBs). GN nanosheet supported NaTi2(PO4)3 nanocrystals (NaTi2(PO4)3/GN) are first prepared by a facile hydrothermal route. Then, the resultant NaTi2(PO4)3/GN hybrid is embedded homogeneously in interconnected GN nanosheet framework to form three-dimensional flexible GN/NaTi2(PO4)3/GN film. The flexible film exhibits excellent cycling stability (91% capacity retention over 1000 cycles at 500 mA g-1) for sodium half cells. Furthermore, it can be assembled into flexible full SIBs (Na0.44MnO2 as the cathode) for practical application. The flexible full battery shows good cycling stability both under flat and bent states, maintaining 92.9% retention after the first 30 cycles under a flat state compared to the original capacity and 86% retention after another 40 cycles under a bent state. This synthesis route offers a general method for constructing other flexible films for SIBs.
UR - http://www.scopus.com/inward/record.url?scp=85046663527&partnerID=8YFLogxK
U2 - 10.1021/acs.cgd.7b01549
DO - 10.1021/acs.cgd.7b01549
M3 - Article
AN - SCOPUS:85046663527
SN - 1528-7483
VL - 18
SP - 3291
EP - 3301
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 6
ER -