Bae, Jaehyeong Kim, Min Soo Oh, Taegon Suh, Bong Lim Yun, Tae Gwang Lee, seung jun Hur, Kahyun Gogotsi, Yury Koo, Chong Min Kim, Il-Doo 2024-01-19T13:02:19Z 2024-01-19T13:02:19Z 2022-01-25 2022-01 1754-5692 https://pubs.kist.re.kr/handle/201004/115889 Nano-hydroelectric technology utilizes hydraulic flow through electronically conducting nanomaterials to generate electricity in a simple, renewable, ubiquitous, and environmentally friendly manner. To date, several designs of nano-hydroelectric devices have been devised to maximize the electrokinetic interactions between water molecules and nanomaterials. However, the reported power generation of the state-of-the-art nano-hydroelectric generators is not sufficient for practical use, as tens of thousands of units were required to operate low-power electronics on a mW scale. Here, we utilize titanium carbide (Ti3C2Tx) MXene nanosheets, which have advantageous properties including metal-like conductivity and hydrophilicity, to facilitate the electrokinetic conversion of the transpiration-driven electrokinetic power generator (TEPG) with a remarkably improved energy generation efficiency compared to that of carbon-based TEPG. The Ti3C2Tx MXene-based TEPG delivered a high pseudo-streaming current of 120 mu A by the fast capillary flow promoted by MXene sheets coated on cotton fabric. The strong cationic affinity of Ti3C2Tx enables the generator to achieve an output of 0.68 V and 2.73 mA when NaCl solution is applied. Moreover, incorporation of a conducting polymer (i.e., Ti3C2Tx/polyaniline composite) enhanced the ionic diffusivity while maintaining the electrical network of Ti3C2Tx. The optimized Ti3C2Tx/polyaniline composite TEPG generated a maximum voltage of 0.54 V, a current of 8.2 mA, and a specific power density of 30.9 mW cm(-3), which was sufficient to successfully charge a commercial Li-ion battery as well as low-power electronics and devices with a volume of 6.72 cm(3). English Royal Society of Chemistry Towards Watt-scale hydroelectric energy harvesting by Ti3C2Tx-based transpiration-driven electrokinetic power generators Article 10.1039/d1ee00859e 1 Energy & Environmental Science, v.15, no.1, pp.123 - 135 Energy & Environmental Science 15 1 123 135 Y scie scopus 000710487100001 2-s2.0-85123021669 Chemistry, Multidisciplinary Energy & Fuels Engineering, Chemical Environmental Sciences Chemistry Energy & Fuels Engineering Environmental Sciences & Ecology Article GRAPHENE OXIDE MXENE ELECTRODE INTERCALATION DISSOLUTION ELECTRICITY CELLULOSE MAX