Construction of MXene/PDMS‐Based Triboelectric Nanogenerators for High‐Performance Cathodic Protection

Abstract

recently introduced self-powered anticorrosion system is the integration of triboelectric nanogenerator (TENG) and cathodic protection, which can realize energy harvesting and self-utilization. [9][10][11][12][13][14] Since it was first reported in 2012, [15] developments of TENG spurt. [16][17][18][19] Based on the coupling effects of triboelectrification and electrostatic induction, TENG has the excellent ability to collect various types of energy and convert it to electric energy, including bioenergy, wave energy, raindrop energy, wind energy, and mechanical energy. Besides, TENG has the advantages of high voltage, low cost, and especially high reliability, robustness, and adaptability. [20,21] TENG has already been applied for small electronic equipment, clinical medicine, supercapacitors, sensors, etc. [22,23] Especially in the ocean, wave energy is huge, abundant, regardless of day and night. [24,25] Comparing with traditional wave energy harvesting technology-electromagnetic power generation, TENG possesses many advantages in converting wave energy into electrical energy, such as higher output power and energy conversion efficiency in low-frequency motion and fairly lower integration construction cost. [26,27] Constructing TENG device and applying it into cathodic protection is one important application of harvesting wave energy. [9] Cui and Wang designed contact-separation mode through modified materials and Zhao fabricated single-electrode mode TENG via polytetrafluoroethylene (PTFE) and electrodes array. [28] Many innovative materials are used to fabricate TENG and applied into cathodic protection, such as, PTFE/polyvinyl alcohol, [13] lead-free KNbO 3 /polyvinyl chloride, [29] hydrophobic A vertical contact-separation mode triboelectric nanogenerator (TENG) to collect mechanical energy and protect stainless steel from corrosion is constructed by spraying to combine MXene powder and polydimethylsiloxane (PDMS). The output of TENG increases significantly by spraying a very small amount (1.2 mg) of MXene, which has excellent conductivity and electronegativity. The MXene/PDMS TENG (MP/PP-TENG) shows the output performance with a short current circuit of 22 µA and output voltage of 900 V, and the output peak power increases by 2.6 times. Meanwhile, MP-TENG is a reliable alternative to power supply for cathodic protection. The electrochemical measurement results show that the open circuit potential drop of the stainless steel coupled with the MP-TENG is about 300 mV. Continuous motion of TENG can realize processive protection of metals, proving its potential practical application to all-weather marine corrosion protection.

Enhancing the Performance of Triboelectric Nanogenerator Via Facile PDMS Surface Modification

“…CLSM images of the aluminum plate before and after salt spraying are shown in Figure a,b; the roughness parameters are summarized in Table 1 . [ 49 ] There was a significant difference between the two samples. After treatment, the root‐mean‐square height ( S q ) of the aluminum plate increased by 5.4 times, and the arithmetic mean height ( S a ) increased by 5.2 times.…”

An Advanced Strategy to Enhance TENG Output: Reducing Triboelectric Charge Decay

“…[107] In 2019, Parandeh et al proposed an eco-friendly composite film based on poly(caprolactone) (PCL) and graphene oxide (GO) by electrospinning approach, with which the TENG output was promoted by 33% compared to the conventional TENG, and has more advantages of low cost, easy making, and biocompatibility. [108] In addition, other 2D materials, such as MoS 2 , [109] graphene quantum dot, [110] TMDs, [111,112] MXene, [113][114][115][116] h-BN (hexagonal boron nitride), [117] MOFs, [118,119] and BP [56,120] have been applied for making composite film to reduce charge decay of triboelectric layer with more special properties to TENG due to unique flexibility and transparency of 2D materials. These studies demonstrate that 2D materials is an effective filler to reduce triboelectric layer decay.…”

Enhanced Triboelectric Nanogenerator Performance Based on Mechanical Imprinting PDMS Microstructures

“…Using saturated calomel electrodes as reference electrodes, the electrolyte is 3.5 wt% NaCl aqueous solution used to simulate seawater conditions. [60] When 304SS is in 3.5 wt% NaCl aqueous solution, the metal is oxidized to ions, which are continuously dissolved into the electrolyte, resulting in continuous corrosion of 304SS metal. When extra power supply continuously supplies electrons to the metal, replacing the metal's electrons loss and thus inhibiting corrosion, that is the impressed current cathodic protection (ICCP).…”