All-printed solid-state substrate-versatile and high-performance micro-supercapacitors for in situ fabricated transferable and wearable energy storage via multi-material 3D printing

Zhang

et al. 2019

Adv Funct Materials

Self Cite

106

3D printing graphene aerogel with periodic microlattices has great prospects for various practical applications due to their low density, large surface area, high porosity, excellent electrical conductivity, good elasticity, and designed lattice structures. However, the low specific capacitance limits their development in energy storage fields due to the stacking of graphene. Therefore, constructing a graphene‐based 2D materials hybridization aerogel that consists of the pseduocapacitive substance and graphene material is necessary for enhancing electrochemical performance. Herein, 3D printing periodic graphene‐based composite hybrid aerogel microlattices (HAMs) are reported via 3D printing direct ink writing technology. The rich porous structure, high electrical conductivity, and highly interconnected networks of the HAMs aid electron and ion transport, further enabling excellent capacitive performance for supercapacitors. An asymmetric supercapacitor device is assembled by two different 4‐mm‐thick electrodes, which can yield high gravimetric specific capacitance (Cg) of 149.71 F g−1 at a current density of 0.5 A g−1 and gravimetric energy density (Eg) of 52.64 Wh kg−1, and retains a capacitance retention of 95.5% after 10 000 cycles. This work provides a general strategy for designing the graphene‐based mixed‐dimensional hybrid architectures, which can be utilized in energy storage fields.

Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Direct Ink Writing of Adjustable Electrochemical Energy Storage Device with High Gravimetric Energy Densities

Zhang

et al. 2019

Adv Funct Materials

Self Cite

106

“…Among them, flexible supercapacitors become a promising candidate. The rapid growth of flexible and portable electronics has stimulated enormous efforts to develop multi-purpose, high-power supercapacitors [1,2,3,4,5,6]. Nowadays, flexible supercapacitors are emerging research directions in rechargeable batteries.…”

Section: Introductionmentioning

confidence: 99%

“…Among various printing technologies, screen printing process is simple, efficient and low-cost [4]. An electrode ink of excellent shear thinning behavior and processability was prepared by Zhang et al [1] which was well-adapted to all kinds of substrates (paper, textile, PET etc.). Additionally, all-printed solid-state micro-supercapacitors were printed using 3D printing techniques.…”

Section: Introductionmentioning

confidence: 99%

VO2(B)/Graphene Composite-Based Symmetrical Supercapacitor Electrode via Screen Printing for Intelligent Packaging

et al. 2018

More multipurpose and convenient demand driven by Radio Frequency Identification (RFID) and intelligent packaging require flexible power sources. A VO2(B)/graphene (VO2(B)/GN) core-shell composite was successfully synthesized by the hydrothermal treatment with V2O5 and graphite. The as-obtained sample was characterized by XRD, FT-IR, SEM, TEM, and XPS measurements. In addition, the electrochemical properties of VO2(B)/GN were tested. Due to its great electrochemical performance and mechanical properties, graphene could increase the electrochemical performance and strengthen the structural stability of the material at the same time. With increasing loading amount of GN, the specific capacitance of VO2(B)/GN increased correspondingly. With 20% GN loading, the initial discharge specific capacity could reach 197 F g−1 at 0.5 A g−1, and 160 F g−1 at 1 A g−1 in 0.5 M Na2SO4 electrolyte, which is better than that of pure rod-like VO2(B). The capacitance of the VO2(B)/GN (20%) composite electrode retains 95.49% after 1000 cycles, which is higher than that of a pure VO2(B) electrode (85.43%), indicating that the VO2(B)/GN composite possesses better cycling stability. Moreover, a symmetrical solid-state supercapacitor (SCs) using VO2(B)/GN(20%) as the anode was assembled. Four printed SCs were connected in series to light up a 1.5 V red LED. This demonstrates its potential application in intelligent packaging to trace food safety.

Direct Ink Writing of Moldable Electrochemical Energy Storage Devices: Ongoing Progress, Challenges, and Prospects

et al. 2021

The depletion of fossil fuel resources and the emerging climate crisis triggered the development in advanced technology for renewable and environmentally friendly energy storage.Electrochemical energy storage (EES) devices, such as rechargeable batteries and electrochemical supercapacitors (SCs), represent a promising and efficient energy storage system with high energy and power densities. [1] SCs store charges by adsorbing ions near the surface of electrode materials or undergo fast reversible surface faradaic redox reactions while storing charges. They are known for their long life cycle (>10 000 times), fast chargedischarge capability, high power density, and safety. [2] However, SCs suffer from low energy density (10-20 Wh kg À1 ). [3] Compared with SCs, batteries store energy in the form of chemical energy through the reversible insertion of ions, such as univalent ions (i.e., H 3 O þ , Li þ , Na þ , or K þ ) or multivalent ions (i.e., Zn 2þ , Mg 2þ , Ca 2þ , or Al 3þ ), into the electroactive host materials. Normally, they have a relatively high energy density of 30-170 Wh•kg À1 , but much longer charging time due to a lower power density. With the ever-growing energy demand for electric vehicles, smart grid and large-scale stationary electrical energy storage systems for solar conversion, wind power, hydroelectricity, and bioenergy EESs that possess a high energy density, power capability, fast charging/discharging rates, long life cycles, as well as a tolerance for transition currents are highly desirable.