Freestanding and Sandwich MXene-Based Cathode with Suppressed Lithium Polysulfides Shuttle for Flexible Lithium–Sulfur Batteries
Copyright policy )Freestanding and Sandwich MXene-Based Cathode with Suppressed Lithium Polysulfides Shuttle for Flexible Lithium–Sulfur Batteries
Flexible lithium-sulfur (Li-S) batteries with high mechanical compliance and energy density are highly desired. This manuscript reported that large-area freestanding MXene (Ti3C2Tx) film has been obtained through a scalable drop-casting method, significantly improving adhesion to the sulfur layer under the continuously bent. Titanium oxide anchored on holey Ti3C2Tx (TiO2/H-Ti3C2Tx) was also produced by the well-controlled oxidation of few-layer Ti3C2Tx, which greatly facilitates lithium ion transport as well as prevents the shuttling of lithium polysulfides. Therefore, the obtained sandwich electrode has demonstrated a high capacity of 740 mAh g-1 at 2 C and a high capacity retention of 81% at 1 C after 500 cycles. Flexible Li-S batteries based on this sandwich electrode have a capacity retention as high as 95% after bending 500 times. This work provides effective design strategies of MXene for flexible batteries and wearable electronics.
- Quzhou University China (People's Republic of)
- Zhejiang University-University of Edinburgh Institute China (People's Republic of)
- Zhejiang University-University of Edinburgh Institute China (People's Republic of)
- Tsinghua University China (People's Republic of)
Chemical Sciences not elsewhere classified, Physiology, high capacity retention, sandwich electrode, scalable drop, high mechanical compliance, wearable electronics, Sociology, sub ><, lithium polysulfides, area freestanding mxene, significantly improving adhesion, 740 mah g, sandwich mxene, Evolutionary Biology, sulfur layer, highly desired, titanium oxide anchored, 2 c, ></ sub >), flexible batteries, x </, 500 cycles, manuscript reported, bending 500 times, 3 </ sub, ></ sub, controlled oxidation, continuously bent, 2 </ sub, also produced, based cathode, obtained sandwich electrode, flexible li –, li –, high capacity, energy density, ></ sub >, capacity retention, Biological Sciences not elsewhere classified, casting method
Chemical Sciences not elsewhere classified, Physiology, high capacity retention, sandwich electrode, scalable drop, high mechanical compliance, wearable electronics, Sociology, sub ><, lithium polysulfides, area freestanding mxene, significantly improving adhesion, 740 mah g, sandwich mxene, Evolutionary Biology, sulfur layer, highly desired, titanium oxide anchored, 2 c, ></ sub >), flexible batteries, x </, 500 cycles, manuscript reported, bending 500 times, 3 </ sub, ></ sub, controlled oxidation, continuously bent, 2 </ sub, also produced, based cathode, obtained sandwich electrode, flexible li –, li –, high capacity, energy density, ></ sub >, capacity retention, Biological Sciences not elsewhere classified, casting method