Solid polymer nanocomposite electrolytes with improved interface properties towards lithium metal battery application at room temperature

Solid polymer electrolytes from polyesters with diester sidechains for lithium metal batteries

“…TiO 2 and Al 2 O 3 ) in an SPE is found to improve its mechanical stability, decrease polymer crystallinity, enhance ionic conductivity by weakening the interactions between host polymer donor groups and Li + ions, inhibit lithium dendrite growth and increase the interfacial compatibility between the electrolyte and electrodes. 9,43 Our own recent work, in which we compared PEO-based SPEs to their nanocomposite analogues with different amounts of TiO 2 nanoparticles, fully supports the above arguments. 9 These ndings indicate that lithium dendrite growth can be successfully suppressed in hybrid ceramic-in-polymer composite materials, comprising so but highly Li + -conducting polymers and nanosized ceramic llers such as TiO 2 nanoparticles.…”

“…9,43 Our own recent work, in which we compared PEO-based SPEs to their nanocomposite analogues with different amounts of TiO 2 nanoparticles, fully supports the above arguments. 9 These ndings indicate that lithium dendrite growth can be successfully suppressed in hybrid ceramic-in-polymer composite materials, comprising so but highly Li + -conducting polymers and nanosized ceramic llers such as TiO 2 nanoparticles.…”

“…We have recently applied the eDRT technique in our group successfully in the investigation of PEO-based SPE systems for tting the measured data points and to analyze the involved processes instead of just nding the best ts using equivalent circuits. 9,48,49 The eDRT technique is a very powerful mathematical method without any a priori assumptions to investigate electrical processes in electrochemical systems which are hidden in impedance data. These curves show the distribution of relaxation times belonging to the individual electrochemical processes contributing to the overall complex resistance.…”

“…7 Some of these issues could be addressed by using nanober-or nanoparticle-reinforced electrolytes based on bottlebrush architectures. 8,9 While most of the recently published studies still focus on ether-based PEO and its copolymers, there is a high interest for "Beyond PEO" SPEs consisting of weakly Li + -coordinating systems. Some examples are poly(acrylonitrile) (PAN), 10,11 polycarbonates [12][13][14] and polyesters.…”

“…7 Some of these issues could be addressed by using nanofiber- or nanoparticle-reinforced electrolytes based on bottlebrush architectures. 8,9…”