High Capacity Sulfurized Alcohol Composite Positive Electrode Materials Applicable for Lithium Sulfur Batteries

Takeuchi, Tomonari; Kojima, Toshikatsu; Kageyama, Hiroyuki; Mitsuhara, Kei; Ogawa, Masahiro; Yamanaka, Kazushi; Ohta, Toshiaki; Kobayashi, Hironori; Nagai, Ryo; Ohta, Akira

doi:10.1149/2.0501701jes

Cited by 8 publications

(13 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured discharge and charge curves for the sample cells are shown in Figure . As reported previously, the SAC/LE (liquid electrolyte) cell showed relatively high discharge capacity (≈990 mAh g −1 ) with large irreversible capacity (≈270 mAh g −1 ) in the first cycling (Figure a). Such low coulomb efficiency (≈73%) was mainly due to the irreversible structural change caused by the breakage of the S═C double bond to form an S–C single bond during the Li‐insertion reaction .…”

supporting

confidence: 83%

“…As reported previously, the SAC/LE (liquid electrolyte) cell showed relatively high discharge capacity (≈990 mAh g −1 ) with large irreversible capacity (≈270 mAh g −1 ) in the first cycling (Figure a). Such low coulomb efficiency (≈73%) was mainly due to the irreversible structural change caused by the breakage of the S═C double bond to form an S–C single bond during the Li‐insertion reaction . The all‐solid‐state (SAC + SE)/SE cell shows lower specific capacity and the coulomb efficiency remains low (≈65%), as shown in Figure b, signifying that the above‐mentioned structural irreversibility is not improved by simply replacing LE with SE; similar electrochemical reactions proceed irrespective of the electrolyte.…”

supporting

confidence: 83%

“…Sulfurized poly(acrylonitrile) (SPAN) is a typical organosulfur material with relatively high specific capacity (600–800 mAh g −1 ). Recently, an additional organosulfur material was synthesized by sulfurizing a more convenient organic reagent (primary alcohol); the resulting sulfurized alcohol composite (SAC) material exhibited higher specific capacity (≈900 mAh g −1 ), probably due to its higher sulfur content (>60 wt%) than SPAN (50–55 wt%) . Despite having high initial specific capacity, the SAC cell showed a large irreversible capacity, which was disadvantageous for the fabrication of the high‐energy‐density cell because larger amounts of Li‐containing anode materials would be required.…”

mentioning

confidence: 99%

“…The SAC sample, synthesized by the reflux method, was black in color. The X‐ray diffraction measurements and transmission electron microscopy observations showed that the sample was in an amorphous state . The estimated chemical composition was C 6.0 H 0.6 S 3.8 , which could have resulted from the following sulfurization reaction

{normalC}_{9} {normalH}_{19} OH + 5.7 S + 4.275 {normalO}_{2} \to 1.5 {normalC}_{6.0} {normalH}_{0.6} {normalS}_{3.8} + 9.55 {normalH}_{2} O

…”

mentioning

confidence: 99%

See 3 more Smart Citations

All‐Solid‐State Lithium‐Sulfur Batteries Using Sulfurized Alcohol Composite Material with Improved Coulomb Efficiency

et al. 2019

Self Cite

View full text Add to dashboard Cite

Sulfurized alcohol composite (SAC), a new type of organosulfur material, is applied to an all‐solid‐state cell with a sulfur‐based solid electrolyte (SE), Li3PS4. The cell shows high specific capacity (600–800 mAh g−1), and the initial coulomb efficiency is improved by mechanically milling the cathode layer (SAC + SE). The improvement is attributed to the partial lithiation of the SAC sample by milling with SE, which is confirmed by S K‐edge X‐ray absorption fine structure measurements. Such prelithiation is advantageous for fabricating high‐energy‐density all‐solid‐state cells.

show abstract

supporting

confidence: 83%

supporting

confidence: 83%

mentioning

confidence: 99%

{normalC}_{9} {normalH}_{19} OH + 5.7 S + 4.275 {normalO}_{2} \to 1.5 {normalC}_{6.0} {normalH}_{0.6} {normalS}_{3.8} + 9.55 {normalH}_{2} O

…”

mentioning

confidence: 99%

See 2 more Smart Citations

All‐Solid‐State Lithium‐Sulfur Batteries Using Sulfurized Alcohol Composite Material with Improved Coulomb Efficiency

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, active materials can be lost and their utilization hampered. (2) Since elementary sulfur have disadvantages of low electronic and ionic conductivity, a large activation polarization is required for utilization of active materials . The utilization of the discharged product of Li 2 S or short‐chain polysulfide is also very low due to the electronically and ionically insulating natures .…”

Section: Fundamentals and Electrochemistry Of Aqueous Li–s Batteriesmentioning

confidence: 99%

Materials and Device Constructions for Aqueous Lithium–Sulfur Batteries

Yun

Yeon

Park

et al. 2018

Adv Funct Materials

View full text Add to dashboard Cite

Lithium-sulfur (Li-S) batteries have advantages in terms of their high specific capacity, natural abundance, and low cost of elementary sulfur on the basis of the multielectron conversion reactions in organic electrolytes. Despite their potential as next-generation batteries, Li-S batteries are still limited by critical challenges such as redox shuttling and the parasitic reaction of polysulfides arising from intrinsic electrochemistry as well as a low electrical conductivity of sulfur and the insolubility of Li 2 S associated with the materials' properties. The unique redox electrochemistry of sulfur in aqueous electrolytes, which is completely different from that in organic electrolytes, provides a rational strategy to resolve the aforementioned problems by the design of new materials and cell constructions. Furthermore, this system enables to achieve significant benefits of aqueous systems in terms of safety, chemical tractability, environmental friendliness, low cost, and high ionic conductivity. Here, at first materials and cell constructions for aqueous Li-S batteries are reviewed, covering the fundamental electrochemistry of sulfur in aqueous electrolytes, the advances in the host materials and aqueous electrolytes, and the cell design of flow-type aqueous Li-S batteries. Additionally, the current impediments and perspectives into the future direction of this field are provided.of 1675 mAh g −1 , natural abundance, and low cost of sulfur cathode. [1] On a basis of the multielectron conversion reaction in organic electrolytes, Li-S batteries can achieve the theoretical energy density of 2567 Wh kg −1 , which is by far higher than 387 Wh kg −1 of LIBs using graphite/ LiCoO 2 . [2] Despite these advantages, Li-S batteries still face some challenges associated with intrinsic redox electrochemistry such as redox shuttling and parasitic reaction of polysulfides as well as materials' properties such as low electrical conductivity (10 −30 S cm −1 ) of sulfur and insolubility of Li 2 S, [3] which is discussed in detail in Section 2. In order to overcome these bottlenecks, most researches mainly focused on developing new host and electrolyte materials, interlayers, separators, additives, and other issues related to organic-based systems. [4] A "gamechanging strategy" is to design materials and cell constructions in different electrolyte solutions, so-called aqueous electrolytes. Along with environmental benign feature of aqueous electrolyte, aqueous rechargeable battery system has significant advantages over organic counterparts in terms of the avoidance of the safety issue of flammable organic electrolytes, the rigorous manufacturing conditions, and the high costs of the electrolyte solvent and salts. However, the energy density of aqueous rechargeable battery system is lowered due to the limited potential window of the aqueous electrolyte by the water decomposition at 1.23 V versus Standard Hydrogen Electrode (SHE), which is much narrower than that of the organic electrolyte. Thermodynamic stability of aqueous ele...

show abstract

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

et al. 2020

View full text Add to dashboard Cite

ising candidates for the next generation of high energy storage system. Since proposed in the 1960s, [3] Li-S battery experienced an infancy stage in 1970-1990s, when researchers devoted to the fundamental redox reactions of sulfur in various electrolytes, [4] and a flourishing period after 2000 when high performance was achieved through sulfur/carbon (S/C) cathode and sulfurized-polyacrylonitrile (SPAN) cathode in ether-and carbonatebased electrolytes, respectively. [5] After 2009, great efforts have been made to further enahnce Li-S battery, including fabricating conductive cathode, [6] incorporating electrocatalyst, [7] modifying separator, [8] optimizing electrolyte, [9] and protecting lithium anodes. [10] The rational design of electrode structure with various carbon materials (1D, 2D, and 3D) greatly boosts the electrochemical performance of sulfur cathode. [11] Although the cycle stability is still struggling with 100 cycles, the gravimetric energy density (W G) of Li-S pouch cells has improved remarkably to promote the applications in which weight matters more than longevity. For example, Sion Power, a pioneer corporation in Li-S battery technology, has developed several prototypical Li-S cells with energy density of 350 Wh kg −1 /325 Wh L −1 for powering Airbus's Zephyr 7 drone for an 11-day nonstop flight in 2014. [12] Oxis Energy, another manufacture of Li-S battery, announced a new target of 500 Wh kg −1 in the near future after achieving 400 Wh kg −1 / 300 Wh L −1 for e-Buses, trucks, and marine applications. [13] Research institutions from China have also reported pouch Li-S cells with the energy density up to 400-600 Wh kg −1 for the potential application in unmanned aerial vehicle. [14] It is remarkable that the W G of Li-S battery has exceeded that of the best Li-ion batteries (250-300 Wh kg −1) with Ni-rich oxide cathode from Contemporary Amperex Technology Co., Ltd. (CATL), a giant manufacture of Li-ion batteries (Figure 1). With such great advantages, Li-S battery is possible to compete with commercial Li-ion batteries in specific field where high W G is the primary concern. Despite the attractive high W G , Li-S battery pales in comparison with Li-ion batteries in terms of volumetric energy density (W V). [18] Figure 1 compares W V and W G between Li-S and Li-ion batteries. With Ni-rich metal oxide as cathode, Li-ion batteries have already reached 700 Wh L −1 and can even exceed 1000 Wh L −1 for W V when coupling with high capacity Lithium-sulfur (Li-S) batteries hold the promise of the next generation energy storage system beyond state-of-the-art lithium-ion batteries. Despite the attractive gravimetric energy density (W G), the volumetric energy density (W V) still remains a great challenge for the practical application, based on the primary requirement of Small and Light for Li-S batteries. This review highlights the importance of cathode density, sulfur content, electroactivity in achieving high energy densities. In the first part, key factors are analyzed in a model on negative/positive ...

show abstract

High Capacity Sulfurized Alcohol Composite Positive Electrode Materials Applicable for Lithium Sulfur Batteries

Cited by 8 publications

References 25 publications

All‐Solid‐State Lithium‐Sulfur Batteries Using Sulfurized Alcohol Composite Material with Improved Coulomb Efficiency

All‐Solid‐State Lithium‐Sulfur Batteries Using Sulfurized Alcohol Composite Material with Improved Coulomb Efficiency

Materials and Device Constructions for Aqueous Lithium–Sulfur Batteries

Strategy of Enhancing the Volumetric Energy Density for Lithium–Sulfur Batteries

Contact Info

Product

Resources

About