Open AccessAutonomous Self-Healing Strategy for Stable Sodium-Ion Battery: A Case Study of Black Phosphorus Anodes
Author(s) -
Daniele Callegari,
Samuele Colombi,
Andrea Nitti,
Cataldo Simari,
Isabella Nicotera,
Chiara Ferrara,
Piercarlo Mustarelli,
Dario Pasini,
Eliana Quartarone
Publication year - 2021
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.0c22464
Subject(s) - anode , materials science , polyacrylic acid , black phosphorus , electrode , ethylene oxide , battery (electricity) , oxide , composite material , chemical engineering , durability , ion , electrochemistry , current density , nanotechnology , optoelectronics , polymer , organic chemistry , chemistry , power (physics) , physics , quantum mechanics , engineering , metallurgy , copolymer
Autonomic self-healing (SH), namely, the ability to repair damages from mechanical stress spontaneously, is polarizing attention in the field of new-generation electrochemical devices. This property is highly attractive to enhance the durability of rechargeable Li-ion batteries (LIBs) or Na-ion batteries (SIBs), where high-performing anode active materials (silicon, phosphorus, etc. ) are strongly affected by volume expansion and phase changes upon ion insertion. Here, we applied a SH strategy, based on the dynamic quadruple hydrogen bonding, to nanosized black phosphorus (BP) anodes for Na-ion cells. The goal is to overcome drastic capacity decay and short lifetime, resulting from mechanical damages induced by the volumetric expansion/contraction upon sodiation/desodiation. Specifically, we developed novel ureidopyrimidinone (UPy)-telechelic systems and related blends with poly(ethylene oxide) as novel and green binders alternative to the more conventional ones, such as polyacrylic acid and carboxymethylcellulose, which are typically used in SIBs. BP anodes show impressively improved (more than 6 times) capacity retention when employing the new SH polymeric blend. In particular, the SH electrode still works at a current density higher than 3.5 A g -1 , whereas the standard BP electrode exhibits very poor performances already at current densities lower than 0.5 A g -1 . This is the result of better adhesion, buffering properties, and spontaneous damage reparation.