Xylene as a New Polymerizable Additive for Overcharge Protection of Lithium Ion Batteries

Abstract

The electrochemical properties and overcharge protection mechanism of xylene as a new polymerizable electrolyte additive for overcharge protection of lithium ion batteries were studied by cyclic voltammetry tests, chargedischarge performance and battery power capacity measurements. It was found that when the battery was overcharged, xylene could electrochemically polymerize at the overcharge potential of 4.3-4.7 V (vs. Li/Li ＋ ) to form a thin polymer film on the surface of the cathode, thus preventing voltage runaway. On the other hand, the use of xylene as an overcharge protection electrolyte additive did not influence the normal performance of lithium ion batteries.

Development of Electrolytes towards Achieving Safe and High‐Performance Energy‐Storage Devices: A Review

“…First, it is very challenging to develop an electrolyte that can show excellent performances in terms of all properties. Among these studies, safety enhancement for liquid electrolytes, [13][14][15][16][17][18][19][20][21] ionic conductivity improvement for solid polymeric electrolytes, balance between mechanical and ionic conductivity properties for gel electrolytes, [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] single-ion conduction, and improvement of the Li + transference number for solid or gel electrolytes [63][64][65][66][67][68][69][70][71][72][73][74] are the most popular topics. Among these studies, safety enhancement for liquid electrolytes, [13][14][15][16][17][18][19][20]…”

Thermal Behavior Investigation of LiNi1/3Co1/3Mn1/3O2‐Based Li‐ion Battery under Overcharged Test

“…Besides, many kinds of additives used in Li-ion battery for overcharge protection were also proposed. [15][16][17] It is well known that the SEI (solid electrolyte interface)-layer formed by the reaction of electrolyte with delithiating lithium in anode played an important role in determining thermal stability of Li-ion battery and that in cathode were also reported in recent years. 11,12 Actually, it still needs more information available which correlates thermal stability studies with full Li-ion battery behavior.…”

Additives for Functional Electrolytes of Li-Ion Batteries

“…For this reason, this type of overcharge protection additive received little interest. Classic examples of such additives are primarily aromatic compounds such as biphenyl [149], cyclohexylbenzene [56,158], and xylene [44,170].…”