Enabling 4C Fast Charging of Lithium‐Ion Batteries by Coating Graphite with a Solid‐State Electrolyte

Kazyak, Eric; Chen, Kuan‐Hung; Chen, Yuxin; Cho, Tae H.; Dasgupta, Neil P.

doi:10.1002/aenm.202102618

Cited by 71 publications

(41 citation statements)

References 64 publications

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“…A particular attention is given to the specific capacities at high rates and the detailed values including their cyclic performances can be seen in Table S4 and Figure S10 (Supporting Information). By means of external coating [31] or compositing, [5b] the upper rate of graphite (2 C) has been significantly improved up to 6 C. Typically, by implanting bismuth nanoparticles into a P/graphite (P/C) composite, the Bi-P/C anode provides a high capacity of 1756 mAh g −1 at 5.2 C. [28q] This strategy demonstrates its great effectiveness in enhancing the specific capacity of graphitebased anodes, while its fast-charging capability (5.2 C) is still not that striking. Phosphorus and vanadium-based high-rate electrode materials are also attracting attentions as they are capable of providing good fast-charging ability up to 10 C. [28i] From this perspective, only LTOs and niobium-based oxides can break the boundary of 10 C. Distinctly, NiNb 2 O 6 , [28l] Nb 18 W 16 O 93 , [5a] and CeNb 3 O 9 , [28p] have demonstrated the outstanding high-rate capability at 100 C. However, only specific capacities of 45-70 mAh g −1 can be achieved (as highlighted in Figure 6d), which are much lower than that of pd-TNO (153 mAh g −1 at 100 C and 76 mAh g −1 at further 200 C).…”

Section: High Capacity and Long Lifetime Of The Pd-tno Under Ultrahig...mentioning

confidence: 99%

Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

et al. 2022

Advanced Energy Materials

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capacities and low lithiation potentials approaching 0 V versus Li/Li + are favored for high-energy applications. [3] Their specific capacities decrease drastically when they are charged and discharged at high rates. For example, the specific capacity of graphite drops from 350 mAh g −1 at 0.2 C to 50 mAh g −1 at 2 C. [4] In addition, their sluggish interfacial kinetics and large spatial overpotential inhomogeneities under fast-charging conditions lead to undesirable plating of the Li dendrites on the electrode surface, [5] which may result in short circuits and thermal runaway. [6] To address this issue, Li 4 Ti 5 O 12 (LTO), which exhibits superior structural stability at high rates, is currently used as an anode in high-power LIBs. [7] The LTO can maintain high stability even when charged and discharged at 50 C. [8] However, in comparison to graphite, the low theoretical capacity (175 mAh g −1 ) and high lithiation potential (1.55 V versus Li/Li + ) of LTO results in a considerably lower energy density of the battery. [9] Therefore, a significant amount of energy density must be sacrificed to achieve high power density in the LIBs. [1a] In recent years, a series of niobium-based anode materials, such as the TiNb 2 O 7 (TNO), [10] Ti 2 Nb 10 O 29 , [11] Nb 16 W 5 O 55 , [5a] and Nb 2 O 5 , [12] have been reported as alternatives to LTO. Among them, TNO is the most promising candidate because of its similar lithiation potential (1.64 V versus Li/Li + ) and considerably higher theoretical capacity (387 mAh g −1 ) than that of LTO. The layered monoclinic structure of the TNO, which consists High-power lithium-ion batteries (LIBs) are critical for power-intensive applications; however, their development is largely hindered by the lack of anode materials that have stability and high capacity at high charging/discharging rates. Herein, a cationic disordering strategy is reported to build an ideal high-power anode with boosted intercalation kinetics and a stable framework. A novel titanium niobate (TiNb 2 O 7 ) anode with unique predistorted Nb(Ti) O 6 octahedrons (pd-TNO) is developed by introducing cation disorder, which allows ultrafast Li + storage within seconds and exceptional stability over long cycling at high rates. The pd-TNO delivers an outstanding specific capacity of 153 mAh g −1 at 100 C, 20 times higher than that of conventional TNO anodes without cationic disordering, and retains 42.8% of the capacity after 15,000 cycles. Using the pd-TNO anode, a high-power LIB with an unprecedented power density of 91,197 W kg −1 at 200 C, which is approximately eight times higher than that of the advanced commercial high-power anode Li 4 Ti 5 O 12 (11,813 W kg −1 at 50 C), is demonstrated. Importantly, the pd-TNO is prepared under ambient conditions via a high-throughput process, and it exhibits considerable potential for scalability for practical applications.

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Section: High Capacity and Long Lifetime Of The Pd-tno Under Ultrahig...mentioning

confidence: 99%

Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

et al. 2022

Advanced Energy Materials

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“…The full battery assembled with LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathode can be charged to 80% capacity in merely 10 minutes, demonstrating excellent fast charging capability. [80] Similarly, coating a small amount of Al 2 O 3 , [81] TiO 2, [82,86] or single-ion conducting solid electrolyte (Li 3 BO 3 -Li 2 CO 3 ) [87] on the surface also has the positive effect on improving the fast charging performance of graphite. Apart from modification methods mentioned above, chemical modification by introducing surface functional groups, [88] light heteroatom doping, [89] and combination with other anode materials [90] are also beneficial to its fast charging performance.…”

Section: Modified Graphitementioning

confidence: 99%

“…Data collected from refs. [37,44,67,75,87–90,93–95,118,142,148,151,178,207–210,238–240,260–262,319,320,333–335.]…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Fast Charging Anode Materials for Lithium‐Ion Batteries: Current Status and Perspectives

Wang

Zhang

et al. 2022

Adv Funct Materials

285

155

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With the enormous development of the electric vehicle market, fast charging battery technology is highly required. However, the slow kinetics and lithium plating under fast charging condition of traditional graphite anode hinder the fast charging capability of lithium‐ion batteries. To develop anode materials with rapid Li‐ions diffusion capability and fast reaction kinetics has received widely attentions. This review summarizes the current status in the exploration of fast charging anode materials, mainly including the critical challenge of achieving fast charging capability, the inherent structures and lithium storage mechanisms of various anode materials, as well as the recent progress to improve the rate performance involving morphology regulation, structure design, surface/interface modification, as well as forming multiphase systems. Finally, the challenges and future directions of developing fast charging Li‐ion batteries are highlighted.

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“…[ 47 ] Moreover, purely interfacial modification using solid electrolytes to form an artificial SEI on graphite also works, like Li 3 BO 3 –Li 2 CO 3 , which decreases interphase impedance by >75% and enables 80% capacity after 500 cycles in pouch cells with >3 mAh cm −2 area capacity at 4C. [ 48 ] These results have further demonstrated the importance of the interphase in achieving fast lithium storage in graphite.…”

Section: Graphite Anodementioning

confidence: 99%

Phosphorus‐Based Anodes for Fast Charging Lithium‐Ion Batteries: Challenges and Opportunities

et al. 2022

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Building better lithium‐ion batteries with higher power density is critical to enhancing the operational experience of portable electronics and electric vehicles. The factors that limit power density at the cell level are a lower rate capability of the anode than the cathode and lithium plating at the anode when recharging at a high rate that increases the risk of internal short circuit and creates a safety hazard. Therefore, developing new anode materials with high rate performance with low lithium plating risk is the key to improve the power density and at the same time achieving extremely fast charging capability. Herein, a comparative review on the advantages and challenges in using graphite, silicon/graphite, and the newly emerging phosphorus‐based anodes, for fast charging, is presented.

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Enabling 4C Fast Charging of Lithium‐Ion Batteries by Coating Graphite with a Solid‐State Electrolyte

Cited by 71 publications

References 64 publications

Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

Fast Charging Anode Materials for Lithium‐Ion Batteries: Current Status and Perspectives

Phosphorus‐Based Anodes for Fast Charging Lithium‐Ion Batteries: Challenges and Opportunities

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