A Biodegradable Polydopamine‐Derived Electrode Material for High‐Capacity and Long‐Life Lithium‐Ion and Sodium‐Ion Batteries

Abstract

Polydopamine (PDA), which is biodegradable and is derived from naturally occurring products, can be employed as an electrode material, wherein controllable partial oxidization plays a key role in balancing the proportion of redox-active carbonyl groups and the structural stability and conductivity. Unexpectedly, the optimized PDA derivative endows lithium-ion batteries (LIBs) or sodium-ion batteries (SIBs) with superior electrochemical performances, including high capacities (1818 mAh g(-1) for LIBs and 500 mAh g(-1) for SIBs) and good stable cyclabilities (93 % capacity retention after 580 cycles for LIBs; 100 % capacity retention after 1024 cycles for SIBs), which are much better than those of their counterparts with conventional binders.

Advanced Organic Electrode Materials for Rechargeable Sodium‐Ion Batteries

“…68) shows reversible two PF 6 − anions insertion at about 3.6 V. [10] The constructed all-organic battery with PAQS anode and PTPAn cathode delivers an output voltage of about 1.8 V and a specific energy density of 92 W h kg −1 . [88] The prepared polydopamine processes decent viscidity, which enables the elimination of the binder. [86] Adv.…”

“…[83][84][85][86][87][88][89] with carboxylate groups are also prepared. [83][84][85][86][87][88][89] with carboxylate groups are also prepared.…”

“…In contrast, the  − OOCArNC and CHNArNCH only remained partial electrochemical activity owning to the Adv. 88,89) with increasing active functional groups don't exhibit the improved capacity for the loss of Ar group. 2017, 7, 1601792 www.advenergymat.de www.advancedsciencenews.com Figure 8.…”

Molecular Engineering with Organic Carbonyl Electrode Materials for Advanced Stationary and Redox Flow Rechargeable Batteries

“…[151] The capacity could stabilize at ≈200 mAh g -1 after 15 cycles with an operation potential of ≈2.6 V (vs Li + /Li), confirming the possibility to enhance the cycling stability by polymerization. Recently, some often used polymers, such as poly(methylmethacrylate) (PMMA, 8-32), [154] and natural polymers, such as polydopamine [155] and vitamin B 2 derivatives (8-34), [156] have also been applied in rechargeable LIBs, which also showed stable cycling life owing to their increased molecular weight. Particularly, 8-30 demonstrated a capacity retention of more than 80% after 40 cycles www.advmat.de www.advancedsciencenews.com (177 mAh g -1 ) with the working potential of ≈2.3 V. [152] The appealing thing is that the two conducting polymers featured good electronic conductivity (0.8-0.9 S cm -1 ), and thus only 15 wt% conductive carbon was needed for the electrode preparation.…”

Enhanced adsorption of carbonyl molecules on graphene via π-Li-π interaction: a first-principle study

“…Carbonyl compounds as active electrode materials in lithium-ion batteries have been gaining more and more attention due to their high theoretical capacities, molecular structure diversities, environmental friendliness and source abundance [1][2][3][4][5]. According to the redox mechanisms, the organic redox-active compounds can be divided into four types: conducting polymers, organic sulfides, organic free radicals, and carbonyl compounds.…”