Materials Reports Energy, Год журнала: 2025, Номер unknown, С. 100317 - 100317
Опубликована: Янв. 1, 2025
Язык: Английский
Energy storage materials, Год журнала: 2022, Номер 55, С. 782 - 807
Опубликована: Дек. 27, 2022
Язык: Английский
Процитировано
47
Chemical Science, Год журнала: 2022, Номер 14(5), С. 1184 - 1193
Опубликована: Дек. 28, 2022
Nonflammable electrolytes are critical for the safe operation of high-voltage lithium-ion batteries (LIBs). Although organic phosphates effective flame retardants, their poor electrochemical stability with a graphite (Gr) anode and Ni-rich cathodes would lead to deterioration electrode materials fast capacity decay. Herein, we develop high-performance electrolyte formulation (4.6 V-class) LIBs using flame-retarding ethoxy(pentafluoro) cyclotriphosphazene (PFPN) as non-solvating diluent high-concentration carbonate-ether hybrid electrolyte. In contrast conventional nonflammable additives restricted dosage, high level PFPN (69% mass ratio in our design) could significantly increase flash point protect favored anion-rich inner solvation sheath because its feature, thus preventing solvent co-intercalation structural damage Gr anode. The also form stable LiF-rich cathode interphase (CEI), which enables superior performances Gr‖LiNi0.8Mn0.1Co0.1O2 (NMC811) full cells at voltages (∼82.0% retention after 1000 cycles 4.5 V; 89.8% 300 4.6 V) temperatures (50 °C). This work sheds light on design engineering developing practical high-energy-density LIBs.
Язык: Английский
Процитировано
41
Energy storage materials, Год журнала: 2023, Номер 60, С. 102832 - 102832
Опубликована: Июнь 1, 2023
Язык: Английский
Процитировано
37
Energy storage materials, Год журнала: 2023, Номер 58, С. 184 - 194
Опубликована: Март 23, 2023
Язык: Английский
Процитировано
36
Small, Год журнала: 2023, Номер 19(49)
Опубликована: Авг. 11, 2023
Abstract High‐nickel layered oxide cathodes and lithium‐metal anode are promising candidates for next‐generation battery systems due to their high energy density. Nevertheless, the instability of electrode–electrolyte interphase is hindering practical application. Localized high‐concentration electrolytes (LHCEs) present a solution achieving uniform lithium deposition stable cathode–electrolyte interphase. However, limited choice diluents cost restricting implementation. Four novel cost‐effective performance with highly reactive LiNiO 2 cathode Li‐metal reported here. The results show that all LHCE cells exhibit Coulombic efficiency >99.38% in Li | Cu capacity retention >85% after 250 cycles. Advanced characterizations unveil cell operation well‐tuned interphases morphology. In addition, online electrochemical mass spectroscopy differential scanning calorimetry reveal gas generation heat‐release greatly reduced LHCEs presented. Overall, study provides new insights into role offers valuable guidance further optimization density batteries.
Язык: Английский
Процитировано
35
Advanced Materials, Год журнала: 2023, Номер 35(39)
Опубликована: Июнь 7, 2023
Ionic dividers with uniform pores and functionalized surfaces display significant potential for solving Li-dendrite issues in Li-metal batteries. In this study, single metal nitrogen co-doped carbon-sandwiched MXene (M-NC@MXene) nanosheets are designed fabricated, which possess highly ordered nanochannels a diameter of ≈10 nm. The experiments computational calculations verified that the M-NC@MXene eliminate Li dendrites several ways: (1) redistributing Li-ion flux via ion channels, (2) selectively conducting ions anchoring anions by heteroatom doping to extend nucleation time dendrites, (3) tightly staggering on routine polypropylene (PP) separator obstruct growth path dendrites. With Zn-NC@MXene-coated PP divider, assembled Li||Li symmetric battery shows an ultralow overpotential ≈25 mV cycle life 1500 h at high current density 3 mA cm-2 capacity mAh . Remarkably, Li||Ni83 pouch cell energy 305 Wh kg-1 is improved fivefold. Moreover, remarkable performance Li||Li, Li||LiFePO4 , Li||sulfur batteries reveal well-designed multifunctional divider further practical applications.
Язык: Английский
Процитировано
33
Nano Energy, Год журнала: 2023, Номер 114, С. 108639 - 108639
Опубликована: Июнь 25, 2023
Язык: Английский
Процитировано
33
Advanced Functional Materials, Год журнала: 2023, Номер 33(45)
Опубликована: Июль 8, 2023
Abstract To overcome the critical safety and performance issues of lithium metal batteries, it is urgent to develop advanced electrolytes with multi‐defensive properties against fire, mechanical puncture, dendrite growth simultaneously, in addition high ion‐conductivity. However, realizing these essential by one electrolyte has proved be extremely challenging due inherent conflicts among them. Herein, circumvent this challenge, a neuron‐like gel polymer (simply referred as Neu‐PE) simultaneously achieve supertoughness, nonflammability, dendrite‐suppression capability self‐driven property reported. This Neu‐PE takes advantage nano‐phase separation regulated highly ion‐conductive deep‐eutectic solvent. As result, holds ambient ionic conductivity (1.27±0.09 mS cm −1 ), super‐toughness strength (22.52 MJ m −3 13.5±0.6 MPa), fire resistance importantly, lithium‐metal anode protection capability. Lithium batteries assembled can work normally even under metal‐probe puncture or serious damage cutting.
Язык: Английский
Процитировано
24
Nano Energy, Год журнала: 2023, Номер 119, С. 109088 - 109088
Опубликована: Ноя. 16, 2023
Язык: Английский
Процитировано
24
Nano Energy, Год журнала: 2024, Номер 125, С. 109571 - 109571
Опубликована: Апрель 4, 2024
Язык: Английский
Процитировано
15