Emerging Catalysts to Promote Kinetics of Lithium–Sulfur Batteries

Advanced Energy Materials, Год журнала: 2021, Номер 11(7)

Опубликована: Янв. 15, 2021

Abstract Lithium–sulfur batteries (LSBs) with a high theoretical capacity of 1675 mAh g −1 hold promise in the realm high‐energy‐density Li–metal batteries. To cope shuttle effect and sluggish transformation soluble lithium polysulfides (LiPSs), varieties traditional metal‐based materials (such as metal, metal oxides, sulfides, nitrides, carbides) unique catalytic activity for accelerating LiPSs redox have been exploited to fundamentally inhibit improve performance LSBs. Concurrently, some budding also possess enormous potential facilitating reaction LSBs, including borides, phosphides, selenides, single atoms, defect‐engineered materials. Here, recent advances these emerging candidates well evaluation methods parameters are comprehensively summarized first time. New insights given aid design high‐performance LSBs satisfy expectation future, exposure active sites adsorption‐catalysis synergy strategies. Finally, current challenges prospects designing highly efficient highlighted, aiming at providing guidance configuring make sure high‐energy long‐life

Язык: Английский

---

Selective Catalysis Remedies Polysulfide Shuttling in Lithium‐Sulfur Batteries

Advanced Materials, Год журнала: 2021, Номер 33(38)

Опубликована: Авг. 2, 2021

Abstract The shuttling of soluble lithium polysulfides between the electrodes leads to serious capacity fading and excess use electrolyte, which severely bottlenecks practical Li‐S batteries. Here, selective catalysis is proposed as a fundamental remedy for consecutive solid‐liquid‐solid sulfur redox reactions. proof‐of‐concept Indium (In)‐based catalyst targetedly decelerates solid‐liquid conversion, dissolution elemental polysulfides, while accelerates liquid‐solid deposition into insoluble Li 2 S, basically reduces accumulation in finally inhibiting shuttle effect. revealed, experimentally theoretically, by changes activation energies kinetic currents, modified reaction pathway together with probed dynamically changing (LiInS catalyst), gradual deactivation In‐based catalyst. battery works steadily over 1000 cycles at 4.0 C yields an initial areal up 9.4 mAh cm −2 loading ≈9.0 mg .

Язык: Английский

---

Recent Advances and Strategies toward Polysulfides Shuttle Inhibition for High‐Performance Li–S Batteries

Advanced Science, Год журнала: 2022, Номер 9(12)

Опубликована: Март 1, 2022

Lithium-sulfur (Li-S) batteries are regarded as the most promising next-generation energy storage systems due to their high density and cost-effectiveness. However, practical applications seriously hindered by several inevitable drawbacks, especially shuttle effects of soluble lithium polysulfides (LiPSs) which lead rapid capacity decay short cycling lifespan. This review specifically concentrates on path LiPSs interaction with corresponding cell components along moving way, systematically retrospect recent advances strategies toward diffusion suppression. Overall, for effect inhibition can be classified into four parts, including capturing in sulfur cathode, reducing dissolution electrolytes, blocking channels functional separators, preventing chemical reaction between Li metal anode. Herein, fundamental aspect Li-S is introduced first give an in-deep understanding generation LiPSs. Then, discussed step step. Finally, general conclusions perspectives future research issues application proposed.

Язык: Английский

---

Challenges and advances in wide-temperature rechargeable lithium batteries

Energy & Environmental Science, Год журнала: 2022, Номер 15(5), С. 1711 - 1759

Опубликована: Янв. 1, 2022

Building rechargeable lithium batteries for wide-temperature applications requires us to investigate the battery failure mechanism at low/high temperature, design advanced electrode/electrolyte materials, and optimize management system.

Язык: Английский

---

An Organodiselenide Comediator to Facilitate Sulfur Redox Kinetics in Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2021, Номер 33(13)

Опубликована: Фев. 15, 2021

Abstract Lithium–sulfur (Li–S) batteries are considered as promising next‐generation energy storage devices due to their ultrahigh theoretical density, where soluble lithium polysulfides crucial in the Li–S electrochemistry intrinsic redox mediators. However, poor mediation capability of polysulfide mediators leads sluggish kinetics, further rendering limited rate performances, low discharge capacity, and rapid capacity decay. Here, an organodiselenide, diphenyl diselenide (DPDSe), is proposed accelerate sulfur kinetics a comediator. DPDSe spontaneously reacts with generate phenylseleno (LiPhSePSs) improved capability. The as‐generated LiPhSePSs afford faster increase deposition dimension sulfide. Consequently, comediator endows superb performance 817 mAh g −1 at 2 C remarkable cycling stability anode excess. Moreover, pouch cells achieve actual initial density 301 Wh kg 30 stable cycles. This work demonstrates novel comediation strategy effective organodiselenide facilitate under cell conditions inspires exploration mediating for practical high‐energy‐density batteries.

Язык: Английский

---

Self‐Assembly of 0D–2D Heterostructure Electrocatalyst from MOF and MXene for Boosted Lithium Polysulfide Conversion Reaction

Advanced Materials, Год журнала: 2021, Номер 33(33)

Опубликована: Июль 9, 2021

Abstract The design of nanostructured electrocatalysts with high activity and long‐term durability for the sluggish lithium polysulfide (LiPS) conversion reaction is essential development high‐performance lithium–sulfur (Li–S) batteries. Here, self‐assembly bimetallic selenides on nitrogen‐doped MXene (CoZn‐Se@N‐MX) based metal–organic framework reported. A combination 0D CoZn‐Se nanoparticles 2D N‐MX nanosheet co‐catalysts forms double lithiophilic‐sulfifilic binding sites that effectively immobilize catalytically convert LiPS intermediates. This 0D–2D heterostructure catalyst has a hierarchical porous architecture large active area enables rapid Li ion diffusion, reduces activation energy 2 S deposition, lowers barrier dissolution. In addition, an assembled CoZn‐Se@N‐MX hybrid synergistically prevents aggregation restacking areas nanosheets during assembly process. Li–S battery this delivers excellent rate capability, ultralong cycling life (over 2000 cycles), areal capacity 6.6 mAh cm −2 low electrolyte/sulfur ratio 5 µL mg −1 .

Язык: Английский

---

P‐Doped NiTe₂ with Te‐Vacancies in Lithium–Sulfur Batteries Prevents Shuttling and Promotes Polysulfide Conversion

Advanced Materials, Год журнала: 2022, Номер 34(11)

Опубликована: Янв. 12, 2022

Lithium-sulfur (Li-S) batteries have been hindered by the shuttle effect and sluggish polysulfide conversion kinetics. Here, a P-doped nickel tellurium electrocatalyst with Te-vacancies (P⊂NiTe2-x ) anchored on maize-straw carbon (MSC) nanosheets, served as functional layer (MSC/P⊂NiTe2-x separator of high-performance Li-S batteries. The P⊂NiTe2-x enhanced intrinsic conductivity, strengthened chemical affinity for polysulfides, accelerated sulfur redox conversion. MSC nanosheets enabled NiTe2 nanoparticle dispersion Li+ diffusion. In situ Raman ex X-ray absorption spectra confirmed that MSC/P⊂NiTe2-x restrained -based cell has cyclability 637 mAh g-1 at 4 C over 1800 cycles degradation rate 0.0139% per cycle, high performance 726 6 C, areal capacity 8.47 cm-2 under configuration 10.2 mg , low electrolyte/sulfur usage ratio 3.9. This work demonstrates vacancy-induced doping heterogeneous atoms enables durable electrochemistry can impact future electrocatalytic designs related to various energy-storage applications.

Язык: Английский

---

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

ACS Nano, Год журнала: 2022, Номер 16(10), С. 15734 - 15759

Опубликована: Окт. 12, 2022

Because of their high energy density, low cost, and environmental friendliness, lithium–sulfur (Li–S) batteries are one the potential candidates for next-generation energy-storage devices. However, they have been troubled by sluggish reaction kinetics insoluble Li2S product capacity degradation because severe shuttle effect polysulfides. These problems overcome introducing transition metal compounds (TMCs) as catalysts into interlayer modified separator or sulfur host. This review first introduces mechanism redox reactions. The methods studying TMC in Li–S provided. Then, recent advances TMCs (such oxides, sulfides, selenides, nitrides, phosphides, carbides, borides, heterostructures) some helpful design modulation strategies highlighted summarized. At last, future opportunities toward presented.

Язык: Английский

---

Rational Design of MOF-Based Materials for Next-Generation Rechargeable Batteries

Nano-Micro Letters, Год журнала: 2021, Номер 13(1)

Опубликована: Окт. 6, 2021

Abstract Metal–organic framework (MOF)-based materials with high porosity, tunable compositions, diverse structures, and versatile functionalities provide great scope for next-generation rechargeable battery applications. Herein, this review summarizes recent advances in pristine MOFs, MOF composites, derivatives, composite derivatives high-performance sodium-ion batteries, potassium-ion Zn-ion lithium–sulfur lithium–oxygen Zn–air batteries which the unique roles of MOFs as electrodes, separators, even electrolyte are highlighted. Furthermore, through discussion MOF-based each system, key principles controllable synthesis electrochemical performance improvement mechanisms discussed detail. Finally, major challenges perspectives also proposed

Язык: Английский

---

Isolated Single-Atom Ni–N₅ Catalytic Site in Hollow Porous Carbon Capsules for Efficient Lithium–Sulfur Batteries

Nano Letters, Год журнала: 2021, Номер 21(22), С. 9691 - 9698

Опубликована: Ноя. 8, 2021

Lithium-sulfur (Li-S) batteries suffer from multiple complex and often interwoven issues, such as the low electronic conductivity of sulfur Li2S/Li2S2, shuttle effect, sluggish electrochemical kinetics lithium polysulfides (LiPSs). Guided by theoretical calculations, a multifunctional catalyst isolated single-atom nickel in an optimal Ni-N5 active moiety incorporated hollow nitrogen-doped porous carbon (Ni-N5/HNPC) is constructed acts ideal host for cathode. The improved electrical conductivity, enhanced physical-chemical dual restricting capability toward LiPSs, and, more importantly, boosted redox reaction moiety. Therefore, Ni-N5/HNPC/S cathode exhibits superior rate performance, long-term cycling stability, good areal capacity at high loading. This work highlights important role coordination number centers catalysts provides strategy to design nanoarchitecture with sites high-performance Li-S batteries.

Язык: Английский

---