Overcoming the Challenges of 5 V Spinel LiNi0.5Mn1.5O4 Cathodes with Solid Polymer Electrolytes

Xu, Hantao; Zhang, Huanrui; Ma, Jun; Xu, Gaojie; Dong, Ting; Chen, Jinchun; Cui, Guanglei

doi:10.1021/acsenergylett.9b01871

Cited by 127 publications

(103 citation statements)

References 110 publications

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“…PMMA is a lightweight and transparent polymer, having about 96% amorphous content at 25 °C, which is preferable to facilitate ion movement. [ 50,51 ] Shukla and Thakur made use of Fourier transform infrared (FTIR) spectroscopy to demonstrate that –CO is the only possible site in the PMMA matrix for coordination with Li + . [ 52 ] Though PMMA has the afore‐mentioned merits, PMMA based electrolytes are relatively brittle and often exhibit low ionic conductivity at room temperature, which exclude them from practical applications.…”

Section: Polymer Matrices For Psesmentioning

confidence: 99%

Polymer‐Based Solid Electrolytes: Material Selection, Design, and Application

Guan

Xiao

Wang

et al. 2020

Adv Funct Materials

221

149

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Polymer‐based solid electrolytes (PSEs) have attracted tremendous interests for the next‐generation lithium batteries in terms of high safety and energy density along with good flexibility. Remarkable performances have been demonstrated in PSEs, which endowed PSEs with the potential to replace liquid electrolytes to meet the market demands. In this review, polymer matrices, different polymer architectures, and functional filler materials used in PSEs are discussed to explore the design concepts, methodologies, working mechanisms, and pros and cons of various PSEs. In addition, their recent notable applications in all‐solid‐state lithium ion batteries, lithium–sulfur batteries, suppression of lithium dendrites, and flexible lithium batteries are also introduced. Finally, the challenges and future prospects are sketched to provide strategies to explore novel PSEs for high‐performance all‐solid‐state lithium batteries.

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Section: Polymer Matrices For Psesmentioning

confidence: 99%

Polymer‐Based Solid Electrolytes: Material Selection, Design, and Application

Guan

Xiao

Wang

et al. 2020

Adv Funct Materials

221

149

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“…Goodenough and co-workers [135] selected a high voltage endurable polymer electrolyte poly(N-methyl-malonic amide) (PMA) to contact the high voltage cathodes and eliminate the electrolyte decompositions. The PMA polymer electrolyte can permit the mobility of Li + and prevent the PEO electrolyte from decomposition at a voltage of >4 V. Cui [136] et al designed poly(vinylene carbonate-acrylonitrile) as gel polymer to increase the compatibility against the high voltage cathode LiNi 0.5 Mn 1.5 O 4 . Adjusting the components such as lithium salts or other additives in polymer electrolyte can also widen the electrochemical window.…”

Section: Lab-level Composite Cathodesmentioning

confidence: 99%

Toward the Scale‐Up of Solid‐State Lithium Metal Batteries: The Gaps between Lab‐Level Cells and Practical Large‐Format Batteries

Zhao

et al. 2020

Advanced Energy Materials

121

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In addition, LIBs still suffer from high cost, limited durability, and poor safety. [3] As a consequence, an alternative rechargeable battery system is crucial to cope with the growing demands of electric vehicles. [4] The prior demand for a power battery is security. The conventional power batteries suffered from frequent combustion accidents. The ascending voltage of cathodes will lead to stability concerns. Most of the thermal runaway is triggered by the reaction derived from electrodes. [6] The decomposition of cathode materials releases heat and oxygen and will trigger the combustion of flammable organic electrolytes. However, the high-energy cathode is essential for an energy-dense battery. Hence the substitution of conventional organic electrolytes is feasible to both enhance the energy density and battery safety. [5,7] The replacement of organic liquid electrolytes (OLEs) with solid-state electrolytes (SSEs) provides a promising future for the large-scale application of lithium metal batteries (LMBs). SSEs with wide electrochemical stability windows and high modulus possess the potential to enable high-capacity electrode materials and prevent Li dendritic deposition. [8] Besides, the SSEs also possess good thermal stability, which enables a wide operation temperature range and avoid the combustion risk. The introduction of SSEs allows a simplified battery design and minimization of inactive materials, consequently increasing energy density at the cell-level. Moreover, the solid-state electrolytes enable the employment of Li metal anodes, which is considered as the most promising anode for next-generation rechargeable batteries due to its ultrahigh theoretical specific capacity of 3860 mAh g −1 and lowest negative electrochemical potential (−3.04 V vs the standard hydrogen electrode). [9] In conventional organic electrolytes, lithium metal suffers from the unstable solid-state interphase, dendrite penetration, and pulverization issues. [1c,10] The rapid deterioration of LMBs is attributed to the high reactivity of lithium metal. [11] Virtually most conventional OLEs can be reduced at the Li surface, forming unstable solid electrolyte interphase (SEI). During repeated charge-discharge cycles, Li tends to generate dendritic morphology because of nonuniform current/ion distribution. [12] Lithium dendrites normally lead to the fracture and regeneration of SEI, further aggravating the dendrite growth. [12a,13] The The scale-up process of solid-state lithium metal batteries is of great importance in the context of improving the safety and energy density of battery systems. Replacing the conventional organic liquid electrolytes (OLEs) with solid-state electrolytes (SSEs) opens a new path for addressing increasing energy demands. Advanced approaches have been validated in lab-scale cells, but only a few successful results can be applied on the practical scale. Herein, the battery systems enabled by SSEs are briefly reviewed and the difficulties and challenges for both lab-level cells and large-scale batteries from...

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“…The high operating voltage may not be harmful to the LNMO cathode itself but causes severe decomposition of carbonate-based electrolytes and other cell components. These by-products after decomposition cause fast decay of the whole battery system and even raise safety issues [19]. The second major challenge is the inferior electronic conductivity (see Table S2), which impedes commercial viability but may not impact lab-scale experiments since the electrodes are typically (less than 50 μm) [20].…”

Section: Introductionmentioning

confidence: 99%

Enabling high areal capacity for Co-free high voltage spinel materials in next-generation Li-ion batteries

Cho

Yao

et al. 2020

Journal of Power Sources

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The rapidly growing technological demand for lithium-ion batteries has prompted the development of novel cathode materials with high energy density, low cost, and improved safety. High voltage spinel, LiNi 0.5 Mn 1.5 O 4 (LNMO), is one of the most promising candidates yet to be commercialized. The two primary obstacles for this material are the inferior electronic conductivity and fast capacity degradation in full cells due to the high operating voltage. By systematically addressing these limitations, we successfully develop a thick LNMO electrode with areal capacity loadings up to 3 mAh⋅cm À 2. The optimized thick electrode is paired with a commercial graphite anode at both the coin cell and pouch cell level, achieving a full cell capacity retention as high as 72% and 78%, respectively, after 300 cycles. We attribute this superior cycling stability to careful optimizations of cell components and testing conditions, with a specific focus improving electronic conductivity and high voltage compatibility. These results suggest precise control of materials quality, electrode architecture and electrolyte optimization can soon support the development of a cobalt-free battery system based on a thick LNMO cathode (>4 mAh⋅cm 2), which will eventually meet the needs of next-generation Li-ion batteries with reduced cost, improved safety, and assured sustainability.

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Overcoming the Challenges of 5 V Spinel LiNi_0.5Mn_1.5O₄ Cathodes with Solid Polymer Electrolytes

Cited by 127 publications

References 110 publications

Polymer‐Based Solid Electrolytes: Material Selection, Design, and Application

Polymer‐Based Solid Electrolytes: Material Selection, Design, and Application

Toward the Scale‐Up of Solid‐State Lithium Metal Batteries: The Gaps between Lab‐Level Cells and Practical Large‐Format Batteries

Enabling high areal capacity for Co-free high voltage spinel materials in next-generation Li-ion batteries

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